Rou jia mo
Walk through Xi'an's Muslim Quarter or any Shaanxi bus station and you will see cooks chopping steaming braised pork on thick wooden blocks and stuffing it into split, griddle-crisped buns. The bread, called baijimo, has a crackly shell with an 'iron ring' edge, a 'tiger-back' top and a spiral 'chrysanthemum heart' inside; the pork is slow-cooked in a soy broth with a dozen warm spices until it falls apart. Chopped with green chilli and coriander and moistened with the braising juices, it makes one of the world's oldest sandwiches. Eat it hot in the hand, with cold liangpi noodles or a bowl of soup alongside. Chef's tip: keep the braising liquid as a master stock in the freezer; the next batch of pork tastes even better.

















