Grill meat an additional 20 to 25 min. or until done (160ºF), brushing with 1/4 cup barbecue sauce for the last 5 min. Transfer meat to cutting board; tent with foil. Let stand 10 min. Meanwhile, finely chop mangos; place in medium bowl. Stir in remaining barbecue sauce, onions and 1 Tbsp. each
lime zest and juice.