I have a universal casserole recipe. It is fun to just put together whatever you have on hand. I'll give suggestions but there are other things to use also. I don't always measure either, just use what I need until I have enough for our family. My mom used to cook this way.
1 cup of main ingredient (tuna, chicken, turkey, ham,seafood.)
1 cup second ingredient(celery, mushrooms, peas, boiled eggs, mix veges)
1-2 cups starchy ingredient (potatoes, noodles, pasta, rice)
1 1/2 cup binder (white sauce, sour cream, cream soups)
1/4 cup goodie-optional(pimiento, olives, almonds, water chestnuts)
Add any seasoning you might think would be good or leave as is
Topping (potato chip crumbs, bread crumbs mixed with melted butter, cheese)
Mix together. If it seems a little dry, add some milk. Bake at 350 for 30-45 min.
Serve with a salad and bread and you have a great meal.
I like to keep frozen peas, and mixed vegetables on hand so that I can put together a chicken pot pie or a casserole quickly. It helps on those busy days.