1Saute onion & green pepper in margarine in. Add tomatoes, oregano, garlic and beef. Simmer for 10 minutes. Stir occasionally to keep from sticking.
2Place 1/2 cook spaghetti in bottom of 9 X 13 inch greased pan. Top with 1/2 of veg/meat mixture. Next top with 1 cup mozzarella cheese and repeat layers. Mix soup and water together and spread over casserole. Top with Parmesan cheese.