1 1/2 lb. lean ground beef
1 can tomato soup
1/3 c. onion, finely chopped
1 tbsp. prepared mustard
1 tbsp. Worcestershire sauce
1 tbsp. prepared horseradish
1 tsp. salt
Dash of pepper

Mix thoroughly. Spread onto browned hamburger bun halves, covering to edges. Broil about 4 inches from heat 12 to 13 minutes. Serve open faced.