Barbecue Sauce - cooking recipe

Ingredients

2 Tbsp. butter
1 onion
stalk of celery
2 Tbsp. vinegar
2 Tbsp. Worcestershire
2 Tbsp. brown sugar
1 tsp. dry mustard
1 tsp. salt
1/4 tsp. pepper
3/4 c. water
1 c. catsup

Preparation

Mix all ingredients together.