HEAT oven to 350ºF.
COMBINE beans, onions, chiles and 1/2 cup barbecue sauce; spread onto bottom of 15x10x1-inch pan.
SPREAD meat with remaining barbecue sauce; cover with coating mix. Place over beans.
BAKE 1 hour 30 min. or until meat is done (160ºF). Remove to platter; let stand 10 min. before slicing. Stir parsley into beans. Discard chiles. Serve beans with meat.