Barbecue Sauce - cooking recipe

Ingredients

1/4 c. butter
1/4 c. vinegar
1/2 c. water
2 Tbsp. sugar
1 medium onion, minced
1 Tbsp. prepared mustard
1/2 c. ketchup
1 clove garlic
1 thick slice lemon
2 Tbsp. Worcestershire sauce
1 1/2 Tbsp. liquid smoke
1 1/2 tsp. salt
1/4 tsp. cayenne pepper
1/2 tsp. pepper

Preparation

Mix vinegar, water, sugar, prepared mustard, cayenne pepper, pepper, salt, onion and butter in saucepan.
Bring to a boil. Reduce heat and simmer, uncovered, for 20 minutes.