Barbecue Sauce - cooking recipe

Ingredients

2 Tbsp. butter or margarine
1 medium onion, sliced
1/2 c. celery, cut in pieces
3/4 c. water
1 c. catsup
2 Tbsp. vinegar
2 Tbsp. lemon juice (can be omitted)
2 Tbsp. Worcestershire sauce
1 tsp. dry mustard
1 tsp. salt
1/4 tsp. pepper

Preparation

Melt butter. Add onion and cook until brown. Add remaining ingredients and cook 20 minutes.