Set oven control to broil. On ungreased cookie sheet, place bun halves, cut side up. Broil 2 to 3 minutes or until golden brown.
Divide warm barbecue sauce with pork evenly onto bottom halves of buns. Top each with pineapple, bell pepper and cheese.
Broil 2 to 3 minutes or until cheese is melted and begins to turn golden. Remove from cookie sheet; cover with top halves of buns.