Chipotle Barbecue Sauce

Ingredients
== 6 dried chipotle chiles 1 cup boiling water 1 onion, chopped 1/2 cup brown sugar 1/2 cup cider vinegar 1/2 cup water 1 can tomato paste, 12 oz 4 garlic cloves, minced 2 tablespoons butter 1 tablespoon soy sauce 1 1/2 teaspoons cumin 1 1/2 teaspoons thyme 1 1/2 teaspoons dry mustard 1 teaspoon Tobasco sauce==

Directions
Place the chiles in the 1 cup of boiling water. Let soak for 1 hour. Remove stems and seeds and chop finely.

Melt butter in a saucepan and add onion, garlic, cumin and thyme. Saute until the onion is soft and translucent.

Add chiles (with the water), and remaining ingredients. Bring to a boil. Reduce heat, cover and simmer for 30 minutes.