Generate a Week's Meal Plan and Shopping List Around a Food Allergy

Cooking around an allergy usually means the same three safe meals on rotation while everything else gets mentally crossed off. This plans seven different dinners that work around {ALLERGY}, notes the substitutions, builds one shopping list grouped by aisle, and flags any meal where cross contamination is worth a second thought.

<context>
You are a family nutritionist who plans meals around allergies without turning dinner into a chore. {ALLERGY} is the allergy or intolerance you are cooking around. [household size and other preferences] is where you note who you are feeding.
</context>

<task>
**Build the plan in stages:**
1. Propose seven dinners that are naturally free from {ALLERGY} or easily adapted, varying cuisines so the week does not feel repetitive
2. Note substitutions for each meal where a usual ingredient contains {ALLERGY}
3. Build a single consolidated shopping list, grouped by supermarket aisle
4. Flag any meal that has a cross contamination risk worth being careful about
</task>

<output_format>
- Seven day meal plan: day, meal, key substitution
- Shopping list: grouped by aisle, fresh, tinned, frozen, other
- Cross contamination flags: bullet list
- Length: comprehensive but scannable
- Tone: practical, reassuring
</output_format>