Broncbuster's Barbecue Sauce

Ingredients

• 2 tablespoons (1/4 stick) butter
• 1 medium onion, chopped
• 1/2 cup water
• 1/2 cup prepared chili sauce
• 1/2 cup catsup
• 1/4 cup cider vinegar
• 2 tablespoons fresh lemon juice
• 2 tablespoons brown sugar
• 2 tablespoons Worcestershire sauce
• 1 tablespoon molasses
• 2 teaspoons salt
• 2 teaspoons dry mustard
• 1/2 teaspoon freshly ground pepper
• 1/2 teaspoon paprika