1 lb. or 3 (7 oz.) boxes spaghetti
1 1/2-2 lbs. hamburger
1 lg. jar spaghetti sauce (may add more tomatoes)
Mozzarella cheese
Cottage cheese (optional)
Parmesan cheese (optional)
Chopped onion
Chopped green pepper

Brown hamburger, onions, green pepper. Drain, add spaghetti sauce and tomatoes (if desired). Simmer. Cook spaghetti, drain. Layer spaghetti, sauce, cheeses. Repeat. End with cheese. Bake at 350 degrees for 30 minutes.