This is one i found on a BBQ website we get most of our smoking/grilling/bbq recipes from. I have not personally tried it but i will this weekend!
Ingredients:
1 large juicy lemon
1 clove garlic, peeled and lightly crushed with the side of a cleaver
1 thin (1/4-inch) slice onion
1 cup Dr Pepper
3/4 cup ketchup
3 tablespoons Worcestershire sauce
2 tablespoons A.1. steak sauce
1 tablespoon of your favorite hot sauce, or more to taste
1 tablespoon cider vinegar,or more to taste
1 teaspoon liquid smoke
1/2 teaspoon freshly ground black pepper
Coarse salt (kosher or sea)
Cut the lemon in half cross wise and cut a 1/4-inch slice off of one half. Remove any seeds in this slice. Juice the remaining lemon: You should have 2 to 3 tablespoons juice.
Place the lemon slice, 2 table spoons of the lemon juice, and the garlic, onion slice, Dr Pepper, ketchup, Worcestershire sauce, steak sauce, hot sauce, vinegar, liquid smoke, and pepper in a heavy nonreactive saucepan and gradually bring to a boil over medium heat.
Reduce the heat slightly to maintain a gentle simmer. Let the sauce simmer gently until thick and richly flavored, 10 to 15 minutes. Taste for seasoning, adding more lemon juice, hot sauce, and/or vinegar as necessary and seasoning with salt to taste, if desired.
Strain the sauce into a bowl (or clean glass jars) and let cool to room temperature, then refrigerate, covered, until serving. The sauce will keep for several months in the refrigerator.