You can use beef (fillet steak) instead of pork, and pop it into the freezer for about an hour so that it is easy to slice really thinly. Make sure the BBQ is red hot and ready to go, but make sure you soak your skewers so that they do not burn. This dish is marinated for at least 2 hours, but overnight is best.
I serve the skewers with a simple salad with peanuts on top, and a bowl of vermicelli noodles that have a few drops of sesame oil in them, along with some home made sweet chili sauce. You can sprinkle the skewers with sesame seeds or coriander.