Chicken Barbecue Sauce

1 tsp. prepared mustard
1 tsp. salt
1/2 tsp. pepper
2 tsp. sugar
1 can (10 1/2 oz.) tomato soup
1 cup water
1 cup dark vinegar
1 medium onion grated
1 Tbsp. Worcestershire sauce
1/4 cup cooking oil

Mix dry ingredients together in quart jar. Add remaining ingredients and mix well. Sauce is enough to barbecue 3-4 chickens.