1 1/2 lbs. ground beef
1 tsp. salt
1/2 c. pizza-flavored catsup
1 tbsp. frozen chopped onions
6 slices Mozzarella cheese
3 split, buttered & toasted buns

Combine meat, salt, 1/4 cup catsup, and onions, shape into 6 patties. Fry or broil until done, about 5 minutes on each side. Spread 1 tablespoon pizza flavored catsup on each bun half, top with patty and a slice of cheese. Place under broiler just long enough to melt cheese slightly. 6 servings.