1 1/2# hamburger, browned and drained
1/4 c. onion
1/2 tsp. oregano
1/4 tsp. garlic salt
1/2 c. tomato sauce
1/2 c. ketchup
10 hard rolls
10 slices mozzarella cheese
butter
Garlic salt

Combine and simmer for 45 minutes. Split hard rolls. Spread butter and garlic salt on rolls. Spoon meat mixture on roll. Add slice of cheese. Put top on roll. Wrap in foil and heat for 5 to 10 minutes (till cheese melts) at 350 degrees.