1In 13x9-inch (3-quart) glass baking dish, mix buttermilk, garlic powder and egg. Add chicken, tossing to coat. Cover; refrigerate 2 to 4 hours.
2In glass pie plate, mix flour, salt, baking powder and red pepper. In another pie plate, place bread crumbs. Remove chicken pieces from buttermilk; coat with flour mixture. Dip chicken in buttermilk mixture again; coat evenly with bread crumbs.
3In deep fryer or 3-quart heavy saucepan, heat oil to 350°F. Fry chicken in hot oil 3 to 5 minutes or until brown. Drain on paper towels.
4Meanwhile, in small bowl, mix mayonnaise, ketchup, lemon-pepper seasoning and Worcestershire sauce. Serve chicken with sauce.