1 1/2 lbs. hamburger, browned and drained
Salt and pepper to taste
1/2 - 1 med. chopped onion
1 lg. can tomato soup
1 c. shredded Mozzarella cheese
Optional: Pepperoni, olives, mushrooms, green peppers

Brown and drain hamburger and onion. Season. Add can of tomato soup. Let this mixture cool. After mixture is cool add cheese and other ingredients. Put about small 1/4 cup of mixture on half a hamburger bun and bake for 15 minutes at 400 degrees.