Put the pork in a bowl and mix with the other ingredients. Heat the grill to very hot. Line the grill pan with foil, put in the lumps of pork and grill till crisp on the outside, but still juicy within, shaking the pan to turn the meat.
Split the baps, buns or muffins horizontally, dip their cut sides in the cooking juices in the grill pan then pile on the chunks of pork. Eat while hot.