GRILL DIRECTIONS: Place ribs in large saucepan or Dutch oven; add enough water to cover. Bring to a boil. Reduce heat; cover and simmer 45 to 60 minutes or until pork is tender and no longer pink next to bones. Drain thoroughly.
Heat grill. In small bowl, combine barbecue, plum and hoisin sauces; blend well.
When ready to grill, brush ribs with sauce mixture. Place ribs on gas grill over medium heat or on charcoal grill 4 to 6 inches from medium coals; cover grill. Cook 10 to 15 minutes or until pork is browned, turning and brushing occasionally with sauce mixture. Discard any remaining sauce mixture.