San Choy Bow is traditionally served as an appetiser, with the warm filling rolled up in lettuce cups. If served in this manner, this recipe will be enough for 4 people, assuming it is to be accompanied by other dishes. I prefer to serve this as a main meal. I make the filling as detailed below, and rather than serve in lettuce cups I toss the meat through softened udon or egg noodles. This will serve 4 as a main meal, assuming you add loads of noodles.