"Create a dairy-free, corn-free, wheat-free from-scratch version of the Allrecipes 'Make-Ahead Breakfast Casserole' as a beginner-friendly breakfast casserole for a household of 3. Keep it quick and easy, minimal processing, low-inflammation friendly, and use only safe ingredients avoiding gluten, dairy, nuts, shellfish, soy, sesame, and corn. Use imperial units only. Include a clear ingredient list, simple steps, bake time, make-ahead/storage notes, and suggest substitutions only if they remain within the allergy restrictions. Base it on a classic breakfast casserole with eggs, breakfast meat, potatoes or bread alternative, vegetables, and seasonings, but ensure everything is made from scratch and safe."