Bourbon Barbecue Sauce - cooking recipe

Ingredients

1/2 cup butter or 1/2 cup margarine
2 medium onions, finely chopped
3 cloves crushed garlic
3 green chilies, seeded and finely chopped
4 cups ketchup
2 tablespoons cider vinegar
2 tablespoons Worcestershire sauce
1 tablespoon honey
2 tablespoons soy sauce
1 cup brown sugar
1 teaspoon dry mustard
1/2 cup Bourbon
ground black pepper

Preparation

In a deep frying pan (Dutch oven?), melt the butter and gently fry the onions, chilies and garlic for about 5 minutes.
Lower the heat and add all the other ingredients, except the Bourbon, stirring after each addition.
Simmer for about 10 minutes, stirring frequently, then add the Bourbon and cook for another 3-5 minutes.
Let the sauce cool, stir now and then.
Put in clean jars or wide neck bottles and label.
Store in a cool dark place.