Barbecue Beef - cooking recipe

Ingredients

1/4 c. vinegar
1 1/2 c. water or broth
1/4 c. sugar
4 tsp. mustard
1/4 tsp. pepper
1 Tbsp. salt
onion
1/2 c. margarine
1 c. ketchup
2 tsp. Worcestershire sauce

Preparation

Cook on stove for 20 minutes, then refrigerate overnight.
Add leftover roast (cut up) to sauce and cook until heated.
Serve on buns.