2 lbs. hamburger
1 can Chef Boyardee spaghetti sauce with mushrooms
1 lg. can tomato paste
1 tsp. garlic salt
2 med. onions
1 tsp. oregano
Mozzarella cheese

Brown meat and onion. Add remaining ingredients. Simmer 1 hour, stirring periodically. Put hot mixture on split hamburger buns, (cover 24 regular halves). Top with shredded Mozzarella cheese. Bake t 375 degrees for 10 minutes or until cheese melts.