Barbecue Beef - cooking recipe

Ingredients

4 c. pot roast (after cooking)
1/4 c. vinegar
1 1/2 c. water or broth
1/4 c. sugar
4 tsp. mustard
1/4 tsp. pepper
1 tsp. salt
2 medium onions
1/2 c. butter
4 Tbsp. ketchup or chili sauce
2 Tbsp. Worcestershire sauce

Preparation

Combine vinegar and next 7 ingredients.
Simmer, uncovered, for 20 minutes, then add Worcestershire sauce, ketchup and meat. Simmer 15 to 20 minutes together.