1 can (6 oz.) tomato paste
1/2 tsp. oregano
1 c. grated Mozzarella cheese
1 tsp. salt
1/4 tsp. chopped onion
1 lb. lean ground beef

Combine and mix tomato paste, salt and seasonings; add meat and mix. Spread 1/3 cup meat mixture on each bun. Broil until done.