diff --git a/app/pubspec.yaml b/app/pubspec.yaml
index c5ce774..b34ab13 100644
--- a/app/pubspec.yaml
+++ b/app/pubspec.yaml
@@ -2,7 +2,7 @@ name: diet_guard_app
 description: "Companion phone app for diet_guard: log meals on the go."
 publish_to: 'none'
 
-version: 1.0.102+1
+version: 1.0.103+1
 
 environment:
   sdk: ^3.12.2
diff --git a/diet_guard/_cli_kuchnia.py b/diet_guard/_cli_kuchnia.py
index e6c9e77..18a9467 100644
--- a/diet_guard/_cli_kuchnia.py
+++ b/diet_guard/_cli_kuchnia.py
@@ -24,13 +24,16 @@ from diet_guard._state import now_local
 
 if TYPE_CHECKING:  # pragma: no cover - typing only
     import argparse
-    from collections.abc import Callable
+    from collections.abc import Callable, Sequence
+
+    from diet_guard._kuchnia_spread import SlottedDish
 
 # ``_kuchnia_import`` reaches ``requests``; registering this subparser must not
 # make every other command pay for an HTTP stack.
 _LAZY_ATTRS = {
     "refresh_delivery": ("diet_guard._kuchnia_import", "refresh_delivery"),
     "log_dishes": ("diet_guard._kuchnia_log", "log_dishes"),
+    "fill_plan": ("diet_guard._kuchnia_log", "fill_plan"),
 }
 
 
@@ -53,7 +56,7 @@ def register_kuchnia_subparser(sub: argparse._SubParsersAction) -> None:
     kuchnia.add_argument(
         "--log",
         action="store_true",
-        help="Also log the dishes as eaten (asks first unless --yes).",
+        help="Also log the dishes into today's empty slots (asks first unless --yes).",
     )
     kuchnia.add_argument(
         "--yes",
@@ -105,15 +108,31 @@ def cmd_kuchnia(
     if not log:
         emit("not logged -- pass --log to record these as eaten.")
         return 0
-    if not yes and ask(f"log all {len(slotted)} as eaten? [y/N] ").strip().lower() != (
-        "y"
-    ):
-        emit("nothing logged.")
-        return 0
-
-    written = module.log_dishes(slotted)
-    if not written:
-        emit("already logged today; nothing to add.")
-        return 0
-    emit(f"logged {len(written)} meal(s).")
+    _log_into_empty_slots(module.fill_plan(slotted), emit, ask, yes=yes)
     return 0
+
+
+def _log_into_empty_slots(
+    plan: Sequence[SlottedDish],
+    emit: Callable[[str], None],
+    ask: Callable[[str], str],
+    *,
+    yes: bool,
+) -> None:
+    """Confirm, then log ``plan`` -- the same rule as the gate's "Fill all".
+
+    Args:
+        plan: The dishes whose slots are still empty today (``fill_plan``).
+        emit: A one-line output sink.
+        ask: A prompt function, used only for the confirmation.
+        yes: Skip the confirmation prompt.
+    """
+    if not plan:
+        emit("every slot already logged today; nothing to add.")
+        return
+    question = f"log {len(plan)} into today's empty slots as eaten? [y/N] "
+    if not yes and ask(question).strip().lower() != "y":
+        emit("nothing logged.")
+        return
+    written = sys.modules[__name__].log_dishes(plan)
+    emit(f"logged {len(written)} meal(s).")
diff --git a/diet_guard/_gatelock.py b/diet_guard/_gatelock.py
index 262f332..0c79236 100644
--- a/diet_guard/_gatelock.py
+++ b/diet_guard/_gatelock.py
@@ -142,8 +142,7 @@ class MealGate(_GateCalendar):
             app_name="diet_guard",
             rank=RANK_DIET_GUARD,
         )
-        # Published here, then owned by LockWindow, which releases it on
-        # close -- so deliberately not kept as an attribute.
+        # Published here, then owned (and released on close) by LockWindow.
         arbiter = Arbiter(
             "diet_guard",
             RANK_DIET_GUARD,
@@ -167,6 +166,7 @@ class MealGate(_GateCalendar):
             on_close=self.close,
             on_fetch_sync=self._on_fetch_sync,
             on_load_delivery=self._on_load_delivery,
+            on_fill_all=self._on_fill_all,
         )
         self._build()
 
diff --git a/diet_guard/_gatelock_delivery.py b/diet_guard/_gatelock_delivery.py
index 33c76fb..f52ee7b 100644
--- a/diet_guard/_gatelock_delivery.py
+++ b/diet_guard/_gatelock_delivery.py
@@ -42,6 +42,9 @@ if TYPE_CHECKING:  # pragma: no cover - typing only
 # ``_cli_gate`` and ``_cli_prune`` use, which also keeps ``patch.object`` working.
 _LAZY_ATTRS = ("refresh_delivery", "refresh_delivery_once")
 
+#: ``(unlock reason, nothing-new status)`` for a sync pull; "Fill all" has its own.
+_SYNC_LABELS = ("Synced from another device", "No new meals found in sync.")
+
 
 def __getattr__(name: str) -> object:
     """Resolve the deferred catering import on first attribute access."""
@@ -226,17 +229,18 @@ class _PullFlows(_GateNutrition):
             return
         self._reconcile_after_fetch()
 
-    def _reconcile_after_fetch(self) -> None:
-        """Drop slots a pulled meal now covers; unlock when none remain."""
+    def _reconcile_after_fetch(self, labels: tuple[str, str] = _SYNC_LABELS) -> None:
+        """Drop slots a pulled meal now covers; unlock if none remain."""
+        unlock, nothing_new = labels
         still_due = set(due_slots())
         satisfied_slots = [slot for slot in self._pending if slot not in still_due]
         self._refresh_dashboard()
         if not satisfied_slots:
-            self._set_status("No new meals found in sync.")
+            self._set_status(nothing_new)
             return
         self._pending = [slot for slot in self._pending if slot in still_due]
         if not self._pending:
-            self._unlock("Synced from another device")
+            self._unlock(unlock)
             return
         self._clear_inputs()
         self._refresh_slot_header()
diff --git a/diet_guard/_gatelock_fillall.py b/diet_guard/_gatelock_fillall.py
new file mode 100644
index 0000000..0d354b9
--- /dev/null
+++ b/diet_guard/_gatelock_fillall.py
@@ -0,0 +1,169 @@
+"""The lock screen's "Fill all" button: today's catering into every empty slot.
+
+Two clicks, never one. The first fetches the day's delivery off the Tk thread
+and shows exactly what would be written; the button relabels to "Confirm (N)".
+Only the second click writes. A delivered meal is not an eaten meal, so the
+user sees the dishes and the slots before anything lands -- and no modal
+dialog asks instead, because a pop-up over a fullscreen grab risks stealing the
+very keyboard grab the lock depends on.
+
+This is *composed* into the gate rather than mixed in: pylint's
+``max-parents`` already counts every class in the gate's MRO, so a new mixin
+fails the hook, and module functions reaching into the gate trip ``SLF001``.
+The gate hands this object the few callables it needs instead.
+
+Which slots get filled -- every slot today, skipping any that already holds an
+entry -- is :func:`diet_guard._kuchnia_log.fill_plan`, shared with
+``diet-guard kuchnia --log`` so the CLI and the gate cannot disagree.
+"""
+
+from __future__ import annotations
+
+from importlib import import_module
+import queue
+from typing import TYPE_CHECKING, NamedTuple
+
+from diet_guard._gatelock_fetch import FETCH_POLL_MS
+from diet_guard._gatelock_kuchnia import start_delivery_fetch
+from diet_guard._kuchnia_log import fill_plan, log_dishes
+from diet_guard._kuchnia_spread import assign_slots
+from diet_guard._meal_schedule_store import current_schedule
+from diet_guard._slots import day_slots
+from diet_guard._state import now_local
+
+if TYPE_CHECKING:  # pragma: no cover - typing only
+    from collections.abc import Callable, Sequence
+    from datetime import date
+    import tkinter as tk
+
+    from diet_guard._gatelock_kuchnia import DeliveryResult, RefreshFn
+    from diet_guard._kuchnia_parse import Dish
+    from diet_guard._kuchnia_spread import SlottedDish
+
+#: The button's resting label; also what it returns to after each attempt.
+FILL_LABEL = "🍱 Fill all"
+
+#: ``(unlock reason, nothing-new status)`` for the gate's post-write reconcile:
+#: a fill that covered only later slots must not report "found in sync".
+RECONCILE_LABELS = (
+    "Filled from catering",
+    "Catering logged; this slot still needs a meal.",
+)
+
+
+def _refresh_delivery(day: date) -> tuple[Sequence[Dish], str | None]:
+    """Fetch ``day``'s dishes, importing the HTTP stack only when clicked.
+
+    ``_kuchnia_import`` reaches ``requests``; the gate's frequent not-due tick
+    imports this module and must not pay for it.
+    """
+    refresh: RefreshFn = import_module("diet_guard._kuchnia_import").refresh_delivery
+    return refresh(day)
+
+
+class FillHooks(NamedTuple):
+    """What the flow calls back into the gate."""
+
+    #: The gate's status-line writer.
+    set_status: Callable[..., None]
+    #: Called after a write, so the gate drops the slots it now covers and
+    #: unlocks when none remain.
+    on_logged: Callable[[], None]
+
+
+class FillAllFlow:
+    """Drives one gate's "Fill all" button through fetch, confirm and log."""
+
+    def __init__(
+        self,
+        root: tk.Misc,
+        label: tk.StringVar,
+        hooks: FillHooks,
+        *,
+        demo_mode: bool,
+    ) -> None:
+        """Bind the flow to a gate.
+
+        Args:
+            root: Schedules the poll on the Tk thread.
+            label: The button's text, shared by its copy on every monitor.
+            hooks: The gate callbacks the flow drives.
+            demo_mode: A demo window refuses: it must never write real
+                entries from a delivery note.
+        """
+        self._root = root
+        self._label = label
+        self._demo_mode = demo_mode
+        self._set_status = hooks.set_status
+        self._on_logged = hooks.on_logged
+        self._result: queue.Queue[DeliveryResult] | None = None
+        self._plan: list[SlottedDish] = []
+        self._plan_day: date | None = None
+
+    def click(self) -> None:
+        """First click fetches and proposes; a second click confirms."""
+        if self._demo_mode:
+            self._set_status("Fill all is only available on the real lock.")
+            return
+        if self._result is not None:
+            return  # a fetch is in flight; a double-click must not start two
+        today = now_local().date()
+        if self._plan and self._plan_day == today:
+            self._confirm()
+            return
+        # No plan, or one proposed before midnight: fetch (again). The day is
+        # pinned here, not when the result lands, so a fetch still in flight
+        # at midnight can never confirm yesterday's menu into today.
+        self._reset()
+        self._plan_day = today
+        self._set_status("Loading today's delivery…")
+        self._result = start_delivery_fetch(_refresh_delivery, today)
+        self._root.after(FETCH_POLL_MS, self._poll)
+
+    def _poll(self) -> None:
+        """On the Tk thread: turn the fetched dishes into a proposal."""
+        result = self._result
+        if result is None:
+            return
+        try:
+            outcome = result.get_nowait()
+        except queue.Empty:
+            self._root.after(FETCH_POLL_MS, self._poll)
+            return
+        self._result = None
+        if outcome.reason is not None:
+            self._set_status(f"{outcome.reason} — still locked.", error=True)
+            return
+        if not outcome.dishes:
+            self._set_status("No catering delivery today.")
+            return
+        plan = fill_plan(assign_slots(outcome.dishes, day_slots(current_schedule())))
+        if not plan:
+            self._set_status("Every slot already has a meal — nothing to fill.")
+            return
+        self._plan = plan
+        self._label.set(f"✓ Confirm ({len(plan)})")
+        total = sum(item.dish.kcal for item in plan)
+        listing = ", ".join(f"{item.slot:02d}:00 {item.dish.name}" for item in plan)
+        self._set_status(
+            f"Will log {len(plan)} ({total:g} kcal): {listing} — click Confirm."
+        )
+
+    def _confirm(self) -> None:
+        """Write the proposed dishes into the slots still empty right now."""
+        # Re-checked at write time: a meal typed in between the two clicks
+        # has taken its slot, and must keep it.
+        plan = fill_plan(self._plan)
+        self._reset()
+        if not plan:
+            self._set_status("Every slot already has a meal — nothing to fill.")
+            return
+        written = log_dishes(plan)
+        self._set_status(f"Logged {len(written)} catering dish(es).")
+        self._on_logged()
+
+    def _reset(self) -> None:
+        """Forget any proposal and restore the button's label."""
+        self._plan = []
+        self._plan_day = None
+        self._label.set(FILL_LABEL)
diff --git a/diet_guard/_gatelock_layout.py b/diet_guard/_gatelock_layout.py
index 0f5ff33..f9e47f6 100644
--- a/diet_guard/_gatelock_layout.py
+++ b/diet_guard/_gatelock_layout.py
@@ -107,8 +107,10 @@ def _build_readouts(body: tk.Frame, vars_: GateVars) -> None:
     ).pack(pady=(XS, XS))
 
 
-def _build_actions(body: tk.Frame, callbacks: GateCallbacks) -> None:
-    """Pack the submit button and the manual sync-fetch button."""
+def _build_actions(
+    body: tk.Frame, callbacks: GateCallbacks, fill_label: tk.StringVar
+) -> None:
+    """Pack the submit button and the three "pull it in" buttons."""
     make_button(
         body,
         _COLORS,
@@ -141,7 +143,20 @@ def _build_actions(body: tk.Frame, callbacks: GateCallbacks) -> None:
         "🍱 Today's delivery",
         callbacks.on_load_delivery,
         ButtonStyle(variant="secondary", bold=False),
-    ).pack(side="left")
+    ).pack(side="left", padx=(0, XS))
+
+    # Every empty slot from today's catering, in two clicks: the first shows
+    # what would be logged and relabels this to "Confirm (N)" -- through the
+    # shared variable, so the copy on every monitor relabels with it.
+    fill = make_button(
+        pulls,
+        _COLORS,
+        fill_label.get(),
+        callbacks.on_fill_all,
+        ButtonStyle(variant="secondary", bold=False),
+    )
+    fill.configure(textvariable=fill_label)
+    fill.pack(side="left")
 
 
 def build_layout(
@@ -183,7 +198,7 @@ def build_layout(
     basis_prefix, per_entry, macros = build_macro_section(root, body, vars_)
 
     _build_readouts(body, vars_)
-    _build_actions(body, callbacks)
+    _build_actions(body, callbacks, vars_.fill_label)
 
     status_label = tk.Label(
         body,
diff --git a/diet_guard/_gatelock_mealflow.py b/diet_guard/_gatelock_mealflow.py
index 1c0e530..56dcfd6 100644
--- a/diet_guard/_gatelock_mealflow.py
+++ b/diet_guard/_gatelock_mealflow.py
@@ -11,6 +11,7 @@ calorie/macro dashboard it calls into lives in :mod:`._gatelock_dashboard`.
 from __future__ import annotations
 
 import contextlib
+from functools import partial
 import tkinter as tk
 from typing import TYPE_CHECKING
 
@@ -18,6 +19,7 @@ from diet_guard._budget import BudgetError, daily_budget
 from diet_guard._budget_derived import protein_target_g
 from diet_guard._foodbank import remember_food
 from diet_guard._gatelock_delivery import _PullFlows
+from diet_guard._gatelock_fillall import RECONCILE_LABELS, FillAllFlow, FillHooks
 from diet_guard._gatelock_ui import ERR, FG, UNIT_GRAMS
 from diet_guard._resolve import lookup_candidates
 from diet_guard._slots import slot_label
@@ -63,6 +65,18 @@ class _GateMealFlow(_PullFlows):
         self._vars.preview.set("")
         self._refresh_projection()
 
+    #: Built on the first "Fill all" click; it holds that button's state.
+    _fill_flow: FillAllFlow | None = None
+
+    def _on_fill_all(self) -> None:
+        """Fill every empty slot from today's catering, on a confirming click."""
+        if self._fill_flow is None:
+            unlock = partial(self._reconcile_after_fetch, RECONCILE_LABELS)
+            hooks = FillHooks(self._set_status, unlock)
+            label, demo = self._vars.fill_label, self.demo_mode
+            self._fill_flow = FillAllFlow(self.root, label, hooks, demo_mode=demo)
+        self._fill_flow.click()
+
     # -- behaviour ------------------------------------------------------------
 
     def _set_status(self, text: str, *, error: bool = False) -> None:
@@ -174,11 +188,13 @@ class _GateMealFlow(_PullFlows):
         Teardown is scheduled *before* the budget is looked up, so a corrupt
         budget file (which raises) can never re-trap the user at unlock time.
         """
-        # A 5-meal plan against 4 slots leaves a dish queued when the last slot
-        # is satisfied (``_kuchnia_spread`` doubles up the earliest slots), so
-        # say what was not offered rather than dropping it silently. Purely
-        # informational: the dishes are already banked, and the lock is over.
-        left = len(self._delivery_pending)
+        # 5 dishes on 4 slots leave one queued when the last slot is satisfied:
+        # name it rather than drop it. Already-logged dishes ("Fill all", a
+        # pull) do not count. Informational only; the lock is over.
+        eaten = {str(e.get("desc", "")).strip().casefold() for e in today_entries()}
+        left = sum(
+            d.name.strip().casefold() not in eaten for d in self._delivery_pending
+        )
         if left:
             noun = "dish" if left == 1 else "dishes"
             logged = f"{logged} ({left} more {noun} delivered; log with 'ate')"
diff --git a/diet_guard/_gatelock_ui.py b/diet_guard/_gatelock_ui.py
index 3b2d843..fb33d15 100644
--- a/diet_guard/_gatelock_ui.py
+++ b/diet_guard/_gatelock_ui.py
@@ -25,6 +25,7 @@ from gatelock import (
     escape_text_tab_trap,
 )
 
+from diet_guard._gatelock_fillall import FILL_LABEL
 from diet_guard._gatelock_spacing import SM, XS
 from diet_guard._gatelock_typography import (
     BODY,
@@ -100,6 +101,7 @@ def make_vars(root: tk.Misc) -> GateVars:
             carbs=tk.StringVar(master=root, value=""),
             fat=tk.StringVar(master=root, value=""),
         ),
+        fill_label=tk.StringVar(master=root, value=FILL_LABEL),
     )
 
 
diff --git a/diet_guard/_gatelock_ui_types.py b/diet_guard/_gatelock_ui_types.py
index 117fb8e..2e3092f 100644
--- a/diet_guard/_gatelock_ui_types.py
+++ b/diet_guard/_gatelock_ui_types.py
@@ -55,6 +55,8 @@ class GateVars:
     dashboard: tk.StringVar
     unit: tk.StringVar
     entries: GateEntryVars
+    #: "Fill all"'s label, shared so it relabels on every monitor at once.
+    fill_label: tk.StringVar
 
 
 @dataclass
@@ -85,3 +87,4 @@ class GateCallbacks:
     on_close: Callable[[], None]
     on_fetch_sync: Callable[[], None]
     on_load_delivery: Callable[[], None]
+    on_fill_all: Callable[[], None]
diff --git a/diet_guard/_kuchnia_log.py b/diet_guard/_kuchnia_log.py
index 2ee20d8..2c2eb8c 100644
--- a/diet_guard/_kuchnia_log.py
+++ b/diet_guard/_kuchnia_log.py
@@ -42,6 +42,24 @@ def _already_logged(entries: Sequence[dict[str, object]], name: str, slot: int)
     )
 
 
+def fill_plan(slotted: Sequence[SlottedDish]) -> list[SlottedDish]:
+    """Keep only the dishes whose slot has nothing logged in it today.
+
+    "Fill all with catering" fills *empty* slots: a slot the user already
+    logged something else into keeps that meal rather than gaining a second
+    one. Occupancy is read once, before the batch, so two dishes the spread
+    put in the same empty slot (5 dishes on 4 slots) both land.
+
+    Args:
+        slotted: Today's dishes, already paired with slots.
+
+    Returns:
+        The dishes to log, in the order given.
+    """
+    taken = {entry.get("slot") for entry in today_entries()}
+    return [item for item in slotted if item.slot not in taken]
+
+
 def dish_nutrition(dish: Dish) -> Nutrition:
     """Return a dish as the whole-portion :class:`Nutrition` it gets logged as.
 
diff --git a/diet_guard/tests/_gate_keyboard_probe.py b/diet_guard/tests/_gate_keyboard_probe.py
index 8094eb2..3904307 100644
--- a/diet_guard/tests/_gate_keyboard_probe.py
+++ b/diet_guard/tests/_gate_keyboard_probe.py
@@ -93,6 +93,7 @@ def probe(screen_w: int = 1366, screen_h: int = 768) -> RingReport:
             on_close=_noop,
             on_fetch_sync=_noop,
             on_load_delivery=_noop,
+            on_fill_all=_noop,
         )
         widgets = build_layout(
             notebook, _make_vars(populated=True), callbacks, demo_mode=False
diff --git a/diet_guard/tests/_gate_layout_probe.py b/diet_guard/tests/_gate_layout_probe.py
index 5b6fb0b..1f933fd 100644
--- a/diet_guard/tests/_gate_layout_probe.py
+++ b/diet_guard/tests/_gate_layout_probe.py
@@ -90,6 +90,8 @@ def _make_vars(*, populated: bool) -> GateVars:
         dashboard=tk.StringVar(value=dashboard),
         unit=tk.StringVar(value="grams"),
         entries=entries,
+        # The wider of the button's two labels, so the row is measured at worst.
+        fill_label=tk.StringVar(value="✓ Confirm (5)" if populated else "🍱 Fill all"),
     )
 
 
@@ -150,6 +152,7 @@ def measure(
             on_close=_noop,
             on_fetch_sync=_noop,
             on_load_delivery=_noop,
+            on_fill_all=_noop,
         )
         widgets = build_layout(
             notebook, _make_vars(populated=populated), callbacks, demo_mode=False
diff --git a/diet_guard/tests/_state_redirects.py b/diet_guard/tests/_state_redirects.py
index f690e21..39378e9 100644
--- a/diet_guard/tests/_state_redirects.py
+++ b/diet_guard/tests/_state_redirects.py
@@ -136,6 +136,11 @@ def state_redirects(tmp_path: Path) -> list[_patch[object]]:
             "diet_guard._gatelock_delivery.refresh_delivery",
             return_value=([], None),
         ),
+        # The gate's "Fill all" button fetches through its own lazy helper.
+        patch(
+            "diet_guard._gatelock_fillall._refresh_delivery",
+            return_value=([], None),
+        ),
         # The Body tab's profile, weight log and published workouts.
         patch("diet_guard._body_store.BODY_FILE", tmp_path / "body.json"),
         # Workout sources live outside diet_guard entirely: RunnerUp's WebDAV
diff --git a/diet_guard/tests/test_gatelock_fillall.py b/diet_guard/tests/test_gatelock_fillall.py
new file mode 100644
index 0000000..715814d
--- /dev/null
+++ b/diet_guard/tests/test_gatelock_fillall.py
@@ -0,0 +1,250 @@
+"""Tests for the lock screen's two-click "Fill all" catering flow.
+
+The properties that matter, because the gate exists to stop unattended logging:
+
+* the first click **never writes** -- it only proposes, and relabels the button;
+* the second click writes only into slots that are **still empty right now**,
+  so a meal typed between the two clicks keeps its slot;
+* a proposal does not survive midnight.
+
+Driven without threads, as in :mod:`test_kuchnia_gate`: the fetch hands back a
+pre-filled queue and the poll is called directly.
+"""
+
+from __future__ import annotations
+
+from datetime import timedelta
+import queue
+from typing import TYPE_CHECKING, cast
+from unittest.mock import MagicMock, patch
+
+from diet_guard import _gatelock_fillall
+from diet_guard._gatelock_fetch import FETCH_POLL_MS
+from diet_guard._gatelock_fillall import FILL_LABEL, FillAllFlow, FillHooks
+from diet_guard._gatelock_kuchnia import DeliveryResult
+from diet_guard._kuchnia_parse import Dish
+from diet_guard._meal_schedule_store import current_schedule
+from diet_guard._slots import day_slots
+from diet_guard._state import log_meal, now_local
+from diet_guard._state_today import today_entries
+from diet_guard.tests._tk_fakes import FakeVar
+from diet_guard.tests.conftest import _nutrition
+
+if TYPE_CHECKING:
+    from collections.abc import Iterator
+    from contextlib import AbstractContextManager
+    import tkinter as tk
+
+
+def dish(name: str, priority: int, kcal: float = 400.0) -> Dish:
+    """A catering dish with its own name, meal order and calories."""
+    return Dish(name, kcal, 30.0, 40.0, 10.0, 300.0, priority, "")
+
+
+#: One dish per default slot, in the caterer's meal order.
+FOUR = (
+    dish("Owsianka", 1, 350),
+    dish("Wrap", 2, 420.5),
+    dish("Obiad", 3, 600),
+    dish("Kolacja", 4, 194),
+)
+
+
+class Harness:
+    """A flow plus everything it calls back into, recorded."""
+
+    def __init__(self, *, demo_mode: bool = False) -> None:
+        self.root = MagicMock()
+        self.label = FakeVar(value=FILL_LABEL)
+        self.statuses: list[tuple[str, bool]] = []
+        self.on_logged = MagicMock()
+        hooks = FillHooks(self._status, self.on_logged)
+        label = cast("tk.StringVar", self.label)
+        self.flow = FillAllFlow(self.root, label, hooks, demo_mode=demo_mode)
+
+    def _status(self, text: str, *, error: bool = False) -> None:
+        self.statuses.append((text, error))
+
+    @property
+    def status(self) -> str:
+        return self.statuses[-1][0]
+
+
+def fetching(*outcomes: DeliveryResult) -> AbstractContextManager[MagicMock]:
+    """Patch the fetch so each click gets one pre-delivered result, in order."""
+
+    def _results() -> Iterator[queue.Queue[DeliveryResult]]:
+        for outcome in outcomes:
+            result: queue.Queue[DeliveryResult] = queue.Queue(maxsize=1)
+            result.put(outcome)
+            yield result
+
+    return patch.object(
+        _gatelock_fillall, "start_delivery_fetch", side_effect=_results()
+    )
+
+
+def delivered(*dishes: Dish) -> DeliveryResult:
+    return DeliveryResult(dishes=dishes, reason=None)
+
+
+def logged() -> dict[int, list[str]]:
+    """Today's on-disk log as slot -> descriptions."""
+    by_slot: dict[int, list[str]] = {}
+    for entry in today_entries():
+        by_slot.setdefault(int(entry["slot"]), []).append(str(entry["desc"]))
+    return by_slot
+
+
+def propose(h: Harness) -> None:
+    """The first click: fetch, then the poll that turns dishes into a plan."""
+    h.flow.click()
+    h.flow._poll()
+
+
+def test_default_schedule_precondition() -> None:
+    # Every expectation below assumes the redirected (default) schedule.
+    assert day_slots(current_schedule()) == (8, 12, 16, 20)
+
+
+class TestFirstClick:
+    def test_demo_mode_refuses_without_fetching(self) -> None:
+        h = Harness(demo_mode=True)
+        with fetching() as start:
+            h.flow.click()
+        start.assert_not_called()
+        assert "only available on the real lock" in h.status
+        assert h.label.get() == FILL_LABEL
+
+    def test_a_click_while_fetching_is_ignored(self) -> None:
+        h = Harness()
+        with patch.object(_gatelock_fillall, "start_delivery_fetch") as start:
+            start.return_value = queue.Queue(maxsize=1)
+            h.flow.click()
+            h.flow.click()
+        start.assert_called_once_with(
+            _gatelock_fillall._refresh_delivery, now_local().date()
+        )
+        assert h.statuses == [("Loading today's delivery…", False)]
+        h.root.after.assert_called_once_with(FETCH_POLL_MS, h.flow._poll)
+
+    def test_the_poll_rearms_while_the_worker_runs(self) -> None:
+        h = Harness()
+        with patch.object(_gatelock_fillall, "start_delivery_fetch") as start:
+            start.return_value = queue.Queue(maxsize=1)
+            h.flow.click()
+        h.flow._poll()
+        assert h.root.after.call_count == 2
+        h.root.after.assert_called_with(FETCH_POLL_MS, h.flow._poll)
+
+    def test_a_stray_poll_is_inert(self) -> None:
+        h = Harness()
+        h.flow._poll()
+        assert h.statuses == []
+        h.root.after.assert_not_called()
+
+    def test_an_outage_proposes_nothing(self) -> None:
+        h = Harness()
+        with fetching(DeliveryResult(dishes=(), reason="panel down")):
+            propose(h)
+        assert h.statuses[-1] == ("panel down — still locked.", True)
+        assert h.label.get() == FILL_LABEL
+        # Fetch done: the next click may fetch again rather than being ignored.
+        assert h.flow._result is None
+
+    def test_no_delivery_today(self) -> None:
+        h = Harness()
+        with fetching(delivered()):
+            propose(h)
+        assert h.status == "No catering delivery today."
+        assert h.label.get() == FILL_LABEL
+
+    def test_every_slot_already_logged(self) -> None:
+        for slot in (8, 12, 16, 20):
+            log_meal(f"mine {slot}", _nutrition(), slot)
+        h = Harness()
+        with fetching(delivered(*FOUR)):
+            propose(h)
+        assert h.status == "Every slot already has a meal — nothing to fill."
+        assert h.label.get() == FILL_LABEL
+
+    def test_the_proposal_writes_nothing(self) -> None:
+        log_meal("my sandwich", _nutrition(), 12)
+        h = Harness()
+        with fetching(delivered(*FOUR)):
+            propose(h)
+        assert h.label.get() == "✓ Confirm (3)"
+        assert h.status == (
+            "Will log 3 (1144 kcal): 08:00 Owsianka, 16:00 Obiad, "
+            "20:00 Kolacja — click Confirm."
+        )
+        assert logged() == {12: ["my sandwich"]}
+        h.on_logged.assert_not_called()
+
+
+class TestConfirm:
+    def test_confirm_fills_only_the_empty_slots(self) -> None:
+        log_meal("my sandwich", _nutrition(), 12)
+        h = Harness()
+        with fetching(delivered(*FOUR)) as start:
+            propose(h)
+            h.flow.click()
+        assert start.call_count == 1  # the confirm did not refetch
+        assert logged() == {
+            8: ["Owsianka"],
+            12: ["my sandwich"],
+            16: ["Obiad"],
+            20: ["Kolacja"],
+        }
+        assert h.status == "Logged 3 catering dish(es)."
+        h.on_logged.assert_called_once_with()
+        assert h.label.get() == FILL_LABEL
+
+    def test_two_dishes_spread_into_one_empty_slot_both_land(self) -> None:
+        # 5 dishes on 4 slots: the spread doubles up 08:00.
+        h = Harness()
+        five = (*FOUR, dish("Przekaska", 5, 100))
+        with fetching(delivered(*five)):
+            propose(h)
+            h.flow.click()
+        assert logged()[8] == ["Owsianka", "Wrap"]
+        assert h.status == "Logged 5 catering dish(es)."
+
+    def test_a_meal_typed_between_the_clicks_keeps_its_slot(self) -> None:
+        h = Harness()
+        with fetching(delivered(*FOUR)):
+            propose(h)
+        assert h.label.get() == "✓ Confirm (4)"
+        log_meal("toast", _nutrition(), 8)
+        h.flow.click()
+        assert logged()[8] == ["toast"]
+        assert h.status == "Logged 3 catering dish(es)."
+
+    def test_every_slot_taken_between_the_clicks(self) -> None:
+        h = Harness()
+        with fetching(delivered(*FOUR)):
+            propose(h)
+        for slot in (8, 12, 16, 20):
+            log_meal(f"mine {slot}", _nutrition(), slot)
+        h.flow.click()
+        assert h.status == "Every slot already has a meal — nothing to fill."
+        h.on_logged.assert_not_called()
+        assert h.label.get() == FILL_LABEL
+        assert all(descs == [f"mine {s}"] for s, descs in logged().items())
+
+    def test_a_proposal_from_yesterday_is_refetched(self) -> None:
+        h = Harness()
+        tomorrow = now_local() + timedelta(days=1)
+        with fetching(delivered(*FOUR), delivered()) as start:
+            propose(h)
+            with patch.object(_gatelock_fillall, "now_local", return_value=tomorrow):
+                h.flow.click()
+        assert start.call_count == 2
+        assert start.call_args.args == (
+            _gatelock_fillall._refresh_delivery,
+            tomorrow.date(),
+        )
+        assert logged() == {}
+        h.on_logged.assert_not_called()
+        assert h.label.get() == FILL_LABEL
+        assert h.status == "Loading today's delivery…"
diff --git a/diet_guard/tests/test_gatelock_fillall_gate.py b/diet_guard/tests/test_gatelock_fillall_gate.py
new file mode 100644
index 0000000..3e934a7
--- /dev/null
+++ b/diet_guard/tests/test_gatelock_fillall_gate.py
@@ -0,0 +1,226 @@
+""" "Fill all" wired into the real gate: the button, the unlock, the leftovers.
+
+:mod:`test_gatelock_fillall` drives the flow alone; this pins what the gate
+adds around it -- one flow per gate, an unlock that names catering as its
+reason, a button that relabels on every monitor, and an unlock line that does
+not claim already-logged dishes are still waiting.
+"""
+
+from __future__ import annotations
+
+from datetime import timedelta
+import os
+import queue
+import tkinter as tk
+from tkinter import ttk
+from typing import TYPE_CHECKING
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+from diet_guard import _gatelock_delivery, _gatelock_fillall, _gatelock_layout
+from diet_guard._gatelock import MealGate
+from diet_guard._gatelock_fillall import FILL_LABEL, _refresh_delivery
+from diet_guard._gatelock_layout import build_layout
+from diet_guard._gatelock_mealflow import _UNLOCK_DELAY_MS
+from diet_guard._gatelock_ui import GateCallbacks, make_vars
+from diet_guard._state import log_meal, now_local
+from diet_guard._state_today import today_entries
+from diet_guard.tests._gate_fixtures import fake_tk
+from diet_guard.tests.conftest import _nutrition
+from diet_guard.tests.test_gatelock_fillall import (
+    FOUR,
+    Harness,
+    delivered,
+    dish,
+    fetching,
+    logged,
+)
+
+if TYPE_CHECKING:
+    from collections.abc import Callable, Iterator
+
+    from gatelock import ButtonStyle, LockConfig
+    from pytest_xvfb import Xvfb
+
+    from diet_guard._gatelock_kuchnia import DeliveryResult
+
+
+def _due_from_log(pending: list[int]) -> Callable[[], tuple[int, ...]]:
+    """``due_slots`` as the log on disk says, so an unlock needs a real write."""
+
+    def due() -> tuple[int, ...]:
+        taken = {entry.get("slot") for entry in today_entries()}
+        return tuple(slot for slot in pending if slot not in taken)
+
+    return due
+
+
+def _fill(gate: MealGate, outcome: DeliveryResult) -> None:
+    """Click "Fill all", let the poll propose, then click again to confirm."""
+    result: queue.Queue[DeliveryResult] = queue.Queue(maxsize=1)
+    result.put(outcome)
+    with patch.object(_gatelock_fillall, "start_delivery_fetch", return_value=result):
+        gate._on_fill_all()
+    flow = gate._fill_flow
+    assert flow is not None
+    flow._poll()
+    gate._on_fill_all()
+    assert gate._fill_flow is flow  # built once, then reused
+
+
+def test_the_fetch_imports_the_http_stack_lazily() -> None:
+    day = now_local().date()
+    target = "diet_guard._kuchnia_import.refresh_delivery"
+    with patch(target, return_value=(FOUR, None)) as refresh:
+        assert _refresh_delivery(day) == (FOUR, None)
+    refresh.assert_called_once_with(day)
+
+
+class TestTheGateDrivesTheFlow:
+    def test_a_demo_gate_refuses(self, gate: MealGate) -> None:
+        with patch.object(_gatelock_fillall, "start_delivery_fetch") as start:
+            gate._on_fill_all()
+        start.assert_not_called()
+        assert "only available on the real lock" in gate._vars.status.get()
+
+    def test_fill_and_confirm_unlocks_from_catering(self, gate: MealGate) -> None:
+        gate.demo_mode = False  # read once, when the flow is first built
+        gate._pending = [8, 12]
+        # Fill all also banks the dishes for one-at-a-time offering; the
+        # unlock line must not then call them "still delivered".
+        gate._delivery_pending = FOUR
+        due = _due_from_log([8, 12])
+        with patch.object(_gatelock_delivery, "due_slots", side_effect=due):
+            _fill(gate, delivered(*FOUR))
+        status = gate._vars.status.get()
+        assert status == "Filled from catering — all meals logged, unlocking…"
+        assert gate._pending == []
+        gate.root.after.assert_called_with(_UNLOCK_DELAY_MS, gate.close)
+        assert sorted(logged()) == [8, 12, 16, 20]
+        assert gate._vars.fill_label.get() == FILL_LABEL
+
+    def test_a_partial_fill_advances_instead_of_unlocking(self, gate: MealGate) -> None:
+        gate.demo_mode = False
+        gate._pending = [8, 12]
+        due = _due_from_log([8, 12])
+        # Two dishes spread onto 08:00 and 16:00: 12:00 is still owed.
+        two = (dish("Owsianka", 1), dish("Obiad", 2))
+        with patch.object(_gatelock_delivery, "due_slots", side_effect=due):
+            _fill(gate, delivered(*two))
+        assert gate._pending == [12]
+        assert "Pulled 1 meal " in gate._vars.status.get()
+        assert "unlocking" not in gate._vars.status.get()
+
+
+class TestLeftoverDishesAtUnlock:
+    """The "(N more dishes delivered)" suffix counts only unlogged dishes."""
+
+    def test_an_already_logged_dish_is_not_leftover(self, gate: MealGate) -> None:
+        # Case and padding differ from the dish name on purpose.
+        log_meal("  KOLACJA ", _nutrition(), 20)
+        gate._delivery_pending = (dish("Kolacja", 4), dish("Obiad", 3))
+        gate._unlock("Logged 20:00")
+        assert gate._vars.status.get() == (
+            "Logged 20:00 (1 more dish delivered; log with 'ate') — "
+            "all meals logged, unlocking…"
+        )
+
+    def test_unlogged_dishes_are_all_counted(self, gate: MealGate) -> None:
+        gate._delivery_pending = (dish("Kolacja", 4), dish("Obiad", 3))
+        gate._unlock("Logged 20:00")
+        assert "(2 more dishes delivered;" in gate._vars.status.get()
+
+    def test_every_queued_dish_logged_means_no_suffix(self, gate: MealGate) -> None:
+        log_meal("Kolacja", _nutrition(), 20)
+        gate._delivery_pending = (dish("Kolacja", 4),)
+        gate._unlock("Logged 20:00")
+        assert "more dish" not in gate._vars.status.get()
+
+
+class TestTheButton:
+    @pytest.mark.usefixtures("dual_output")
+    def test_every_monitor_shares_one_label(self) -> None:
+        built: list[tk.Button] = []
+        real = _gatelock_layout.make_button
+
+        def record(
+            parent: tk.Misc,
+            config: LockConfig,
+            text: str,
+            command: Callable[[], None],
+            style: ButtonStyle | None = None,
+        ) -> tk.Button:
+            button = real(parent, config, text, command, style)
+            built.append(button)
+            return button
+
+        with (
+            fake_tk(),
+            patch.object(_gatelock_layout, "make_button", side_effect=record),
+        ):
+            gate = MealGate(demo_mode=True)
+        fills = [
+            b
+            for b in built
+            if getattr(b, "configured", {}).get("textvariable") is gate._vars.fill_label
+        ]
+        assert len(fills) == 2  # one per monitor, one shared variable
+        assert all(b.configured["command"] == gate._on_fill_all for b in fills)
+
+    def test_the_real_button_relabels_through_its_variable(
+        self, xvfb: Xvfb | None
+    ) -> None:
+        # Real Tk, so only ever on pytest-xvfb's private display -- never the
+        # user's. No Xvfb means no test, not a window on :0.
+        if xvfb is None:
+            pytest.skip("needs pytest-xvfb's private display")
+        assert os.environ["DISPLAY"] == f":{xvfb.display}"
+        root = tk.Tk()
+        try:
+            root.withdraw()
+            on_fill_all = MagicMock()
+            callbacks = GateCallbacks(
+                *(MagicMock() for _ in range(5)), on_fill_all=on_fill_all
+            )
+            vars_ = make_vars(root)
+            notebook = ttk.Notebook(root)
+            widgets = build_layout(notebook, vars_, callbacks, demo_mode=False)
+            button = _find_fill_button(widgets.frame, str(vars_.fill_label))
+            assert button.cget("text") == FILL_LABEL
+            vars_.fill_label.set("✓ Confirm (3)")
+            assert button.cget("text") == "✓ Confirm (3)"
+            button.invoke()
+            on_fill_all.assert_called_once_with()
+        finally:
+            root.destroy()
+
+
+def _walk(widget: tk.Misc) -> Iterator[tk.Misc]:
+    yield widget
+    for child in widget.winfo_children():
+        yield from _walk(child)
+
+
+def _find_fill_button(frame: tk.Misc, var_name: str) -> tk.Button:
+    matches = [
+        w
+        for w in _walk(frame)
+        if isinstance(w, tk.Button) and str(w.cget("textvariable")) == var_name
+    ]
+    assert len(matches) == 1
+    return matches[0]
+
+
+def test_a_fetch_spanning_midnight_never_confirms_yesterdays_menu() -> None:
+    # Clicked on day D; the result lands, and Confirm comes on D+1. The plan
+    # belongs to the day that was *fetched*, so D+1 refetches and logs nothing.
+    h = Harness()
+    tomorrow = now_local() + timedelta(days=1)
+    with fetching(delivered(*FOUR), delivered()) as start:
+        h.flow.click()
+        with patch.object(_gatelock_fillall, "now_local", return_value=tomorrow):
+            h.flow._poll()
+            h.flow.click()
+    assert start.call_args.args[1] == tomorrow.date()
+    assert logged() == {}
diff --git a/diet_guard/tests/test_kuchnia_cli.py b/diet_guard/tests/test_kuchnia_cli.py
index c19fdba..b023e32 100644
--- a/diet_guard/tests/test_kuchnia_cli.py
+++ b/diet_guard/tests/test_kuchnia_cli.py
@@ -116,16 +116,18 @@ class TestCli:
             _cli_kuchnia.cmd_kuchnia(lines.append, _record, log=True, yes=True)
         assert asked == []
 
-    def test_already_logged_says_so(self) -> None:
+    def test_every_slot_taken_says_so_and_logs_nothing(self) -> None:
         lines: list[str] = []
         with (
             patch.object(
                 _cli_kuchnia, "refresh_delivery", return_value=([_dish()], None)
             ),
-            patch.object(_cli_kuchnia, "log_dishes", return_value=[]),
+            patch.object(_cli_kuchnia, "fill_plan", return_value=[]),
+            patch.object(_cli_kuchnia, "log_dishes") as logger,
         ):
             self._run(lines, log=True, yes=True)
-        assert any("already logged" in line for line in lines)
+        assert logger.call_count == 0
+        assert any("every slot already logged" in line for line in lines)
 
 
 class TestDispatch:
diff --git a/diet_guard/tests/test_kuchnia_fill.py b/diet_guard/tests/test_kuchnia_fill.py
new file mode 100644
index 0000000..176840b
--- /dev/null
+++ b/diet_guard/tests/test_kuchnia_fill.py
@@ -0,0 +1,78 @@
+"""Tests for "fill all with catering": which slots a delivery may fill.
+
+The rule is shared by ``diet-guard kuchnia --log`` and the gate's "Fill all"
+button (:func:`diet_guard._kuchnia_log.fill_plan`): every slot today, but only
+the ones with nothing logged yet.  A slot the user already ate something in
+keeps that meal rather than gaining a catering dish on top.
+"""
+
+from __future__ import annotations
+
+from dataclasses import replace
+from unittest.mock import patch
+
+from diet_guard import _cli_kuchnia
+from diet_guard._estimator import Nutrition
+from diet_guard._kuchnia_log import fill_plan, log_dishes
+from diet_guard._kuchnia_parse import Dish
+from diet_guard._kuchnia_spread import SlottedDish
+from diet_guard._state import log_meal
+from diet_guard._state_today import today_entries
+
+
+def _slotted(name: str, slot: int) -> SlottedDish:
+    dish = Dish(
+        name=name,
+        kcal=400.0,
+        protein_g=30.0,
+        carbs_g=40.0,
+        fat_g=12.0,
+        grams=300.0,
+        priority=1,
+        slot_label="Obiad",
+    )
+    return SlottedDish(dish, slot)
+
+
+def _eat(desc: str, slot: int) -> None:
+    log_meal(desc, Nutrition(95.0, 0.5, 25.0, 0.3, 180.0, "manual"), slot)
+
+
+class TestFillPlan:
+    def test_an_empty_day_fills_every_slot(self) -> None:
+        plan = [_slotted("A", 8), _slotted("B", 12), _slotted("C", 20)]
+        assert fill_plan(plan) == plan
+
+    def test_a_slot_with_a_meal_keeps_it(self) -> None:
+        _eat("apple", 12)
+        plan = fill_plan([_slotted("A", 8), _slotted("B", 12), _slotted("C", 20)])
+        assert [item.slot for item in plan] == [8, 20]
+
+    def test_two_dishes_sharing_an_empty_slot_both_land(self) -> None:
+        # 5 dishes on 4 slots double up the first; occupancy is read once,
+        # before the batch, so the second dish is not refused by the first.
+        plan = fill_plan([_slotted("A", 8), _slotted("B", 8)])
+        assert log_dishes(plan) == ["A", "B"]
+
+    def test_a_full_day_fills_nothing(self) -> None:
+        for slot in (8, 12):
+            _eat("apple", slot)
+        assert fill_plan([_slotted("A", 8), _slotted("B", 12)]) == []
+
+
+class TestCliFill:
+    def test_log_skips_a_taken_slot(self) -> None:
+        # Two dishes on the default four slots spread to 08:00 and 16:00.
+        _eat("apple", 8)
+        dishes = [
+            replace(_slotted("Owsianka", 8).dish, priority=1),
+            replace(_slotted("Kaszotto", 16).dish, priority=2),
+        ]
+        lines: list[str] = []
+        with patch.object(
+            _cli_kuchnia, "refresh_delivery", return_value=(dishes, None)
+        ):
+            _cli_kuchnia.cmd_kuchnia(lines.append, lambda _p: "y", log=True, yes=False)
+        logged = {(entry["desc"], entry["slot"]) for entry in today_entries()}
+        assert logged == {("apple", 8), ("Kaszotto", 16)}
+        assert "logged 1 meal(s)." in lines
diff --git a/docs/DOCS-kuchnia-wikinga.md b/docs/DOCS-kuchnia-wikinga.md
index b3d7665..9d3ebcb 100644
--- a/docs/DOCS-kuchnia-wikinga.md
+++ b/docs/DOCS-kuchnia-wikinga.md
@@ -17,10 +17,14 @@ So:
 - **`diet-guard kuchnia`** banks the day's dishes and prints them. Nothing is
   logged.
 - **`diet-guard kuchnia --log`** asks first (`--yes` skips the prompt for
-  scripting).
+  scripting), then fills today's *empty* slots — the same rule as below.
 - **The lock screen's "🍱 Today's delivery"** button *prefills* the meal form,
   dish by dish, in the caterer's own meal order. The user still clicks
   "Log & Continue" for each.
+- **"🍱 Fill all"** takes two clicks: the first lists what would be logged and
+  relabels it "✓ Confirm (N)", the second logs every dish into its slot —
+  all of today's, later ones included — skipping any slot that already holds
+  a meal (`_kuchnia_log.fill_plan`, re-checked at the second click).
 
 The queue **survives each submit**: `_finish_slot` calls `_prefill_next_dish`
 so the next dish is already in the form, carrying the "Logged HH:00 …"