1 lb. ground beef
1 (6 oz.) can tomato paste
1 tsp. crushed oregano
1/2 c. chopped onion
1 tsp. salt
1/4 tsp. garlic powder
Thinly sliced mozzarella cheese
Buns

Cook beef and onion until tender but not brown. Add tomato paste and seasonings. Simmer, uncovered, about 15 minutes. Spoon over bun halves. Add slice of cheese onto each bun. Brown cheese slightly in broiler. Serve hot!