1 can tomato soup or pizza sauce
1 1/2 lb. hamburger
2/3 c. Italian flavored fine dry bread crumbs
2/3 c. chopped onion
1 egg
1/4 tsp. salt
4 oz. Mozzarella cheese, cut into sm. cubes

Mix half of soup and rest of ingredients except cheese. Shape into meatballs with a cube of cheese in the middle of each one. These can either be fried or microwaved until done and then served with rest of sauce.