1 1/2 lbs. ground chuck
1 sm. onion, chopped fine
1/4 tsp. Worcestershire sauce
1/2 tsp. salt
1 can tomato soup
1 tsp. mustard
8 hamburger buns

Split and lightly brown buns on broiler. Mix all ingredients. Spread on buns. Cover to edges. Broil 15 to 18 minutes. Makes 12 to 16 open faced sandwiches.