Barbecued Hamburger

1 onion, chopped

1 tbsp fat

2 lb hamburger

½ cup catsup

2 tbsp brown sugar

2 tbsp vinegar

2 tsp mustard

1 tsp Worcestershire sauce

Fry onion in fat until golden brown. Add hamburger and brown. Pour off excess fat. Combine remaining ingredients. Add to meat mixture; simmer until hot. Serve in buns. Yield: 8 servings.