2 1/2 lb. hamburger
1 med. onion, chopped
2 1/2 tbsp. Worcestershire sauce
2 tbsp. vinegar
1/3 c. brown sugar
1/2 c. catsup
1 tbsp. mustard
1 (10 oz.) can cream of mushroom soup

Fry hamburger and onion along with salt and pepper to taste. Drain grease and add Worcestershire sauce, sugar, catsup, mustard and soup. Heat and serve.