REMOVE 1/4 cup of the barbecue sauce; set aside. Mix remaining ingredients until well blended.
SHAPE mixture into loaf in 12x8-inch microwavable dish; top with reserved 1/4 cup barbecue sauce. Cover loosely with wax paper.
MICROWAVE on HIGH 12 to 14 minutes or until cooked through, turning dish after 7 minutes. Let stand 5 minutes before cutting into slices to serve.