Here is my recipe for baked spaghetti: Hope you will try it.
1 lb. cooked spaghetti
2-14.5 oz. cans diced tomatoes
1 med. onion
1green pepper
1/4 c. butter or marg.
1 small can sliced black olives
1 small can mushroom pieces
1can cream of mushroom soup
1 tsp dried oregano
Shredded cheddar cheese
soften onion, mushrooms, in the butter, add the olives ,oregano, and tomatoes and mix together.
In a 9x13 pan layer half the pasta, half the veggie mixture, 1 cup cheddar cheese. repeat the second layer.
Mix soup with 1/4 c. water and spread over top. Sprinkle with parmesan cheese.
Bake at 350 for 30 min. or until hot. This freezes well.