1.Heat half oil in a large wok or frying pan on high; stir-fry pork and spice 2-3 minutes, until well browned. Transfer to a plate and set aside.
2.Place noodles in a heatproof bowl. Cover with boiling water and set aside 2 minutes. Gently break up noodles with a fork. Drain well.
3.Heat remaining oil in wok on high; stir-fry onion, capsicum, ginger and garlic 1-2 minutes, until just tender.
4.Return pork to wok with noodles, choy sum stems, sauce and sherry; stir-fry 1-2 minutes, to heat through. Add choy sum leaves, tossing 1 minute, until wilted.
Purchase jars of minced garlic and ginger for added speed and value. Store them in the fridge.