BBQ Sauce

Ingredients
2 tablespoons fresh lemon juice
1 onion, peeled and sliced
1/4 cup distilled white vinegar
1/2 cup water
2 tablespoons brown sugar
1 tablespoon prepared mustard
1/2 teaspoon ground black pepper
1 1/2 teaspoons salt
1/4 teaspoon cayenne pepper
1/4 cup vegetable oil
1/2 cup ketchup
2 tablespoons Worcestershire sauce
1 1/2 teaspoons liquid smoke flavoring

Directions
1.In a medium saucepan, mix lemon juice, onion, distilled white vinegar, water, brown sugar, prepared mustard, ground black pepper, salt, cayenne pepper and vegetable oil. Bring to a boil, then simmer uncovered 20 minutes.
2.Stir ketchup, Worcestershire sauce and liquid smoke flavoring into the mixture. Return to boil, then remove from heat. Refrigerate until ready for use.