Tennessee Bbq Sauce - cooking recipe

Ingredients

1 cup ketchup
1/2 cup vinegar
1/4 cup Worcestershire sauce
2 cups water
1 onion, chopped
1/2 cup brown sugar
1 teaspoon celery seed
1/2 teaspoon salt

Preparation

Combine ingredients in small saucepan and bring to boil.
Simmer until reduced to thick sauce, stirring occasionally.