Kansas City BBQd Chicken

Name: Kansas City BBQ'd Chicken
Ingredients: 3 1/2 pounds mixed chicken parts (breasts halved); Kosher salt and freshly ground black pepper; 2 cups Kansas City-Style BBQ Sauce, recipe follows; 2 tablespoons neutral-tasting oil, such as grapeseed or vegetable; 6 cloves garlic, smashed; 2 tablespoons tomato paste; 1 slightly heaping tablespoon chili powder; 1 tablespoon paprika; 1 teaspoon crushed red pepper flakes; 1/4 teaspoon ground allspice; Pinch ground cloves; 2 cups ketchup; 2 cups water; 1/2 cup cider vinegar; 1/4 cup dark molasses; 1/4 cup firmly packed dark brown sugar; 1 tablespoon kosher salt; 1 tablespoon soy sauce; 1 tablespoon Worcestershire sauce; 2 teaspoons English-style dried mustard; 1 teaspoon freshly ground black pepper; 1 bay leaf