Baked Spaghetti

1 cup chopped onion
1 cup chopped green pepper
1 tbsp butter
1 can 28 oz diced tomatoes undrained
1 can 4 oz mushroom stems and pieces drained
1 can 2 1/4 oz ripe olives drained
2 tsp dried oregano
1 lb cooked ground beef
12 oz spaghetti cooked and drained
2 cups shredded cheddar cheese
1 can cream of mushroom soup
1/4 cup water
1/4 cup grated Parmesan cheese

In a large skillet, saute onion and gr pepper in butter until tender. Add tomatoes, mushrooms, olives and oregano. Add ground beef, simmer 10 min. Place 1/2 spaghetti in greased 13x9x2
baking dish. Top with 1/2 vegetable mixture. Sprinkle 1 cup cheese and repeat layers. Mix water with soup and pour over top. Top with Parmesan. Bake 350 for 30 min.