Storage Tips
Leftover casserole keeps well in an airtight container for up to four days in the fridge. To reheat simply cover and warm in a 350 degree oven until hot or microwave individual portions. For best results leave the topping off when freezing and add fresh onions after reheating.
Ingredient Substitutions
If you are out of mozzarella or Swiss try Monterey Jack for a creamy melt. For a dairy-free version use a plant based sour cream and cheese option plus cream of mushroom soup in place of cream of chicken. You can swap rotisserie chicken for leftover turkey or even cooked pork if needed.
