From: Every Grain of Rice
Bring a large panful of water to a boil (2.5 litres will do)
Wash and trim the Chinese broccoli. If the lower parts of the stems are thick and fibrous, peel away their outer skin with a potato peeler
When the water is boiling, add 1 tsp salt and 1 tbsp oil then add the Chinese broccoli. Blanch it for a minute or two to break its rawness. The stems should be just tender, but still crisp. If you are stir-frying them immediately, simply drain the broccoli stems and shake dry in a colander. If you want to serve them later, refresh the stems under a cold tap to arrest cooking before draining well
When you wish to serve the broccoli, add the remaining oil to a seasoned wok over a high flame, swirl it around then add the ginger and sizzle briefly until you can smell its fragrance. Splash in the Shaoxing wine and add the sugar. Tip in the broccoli and stir-fry, adding salt to taste, until it is piping hot. If you are using broccoli blanched earlier, then cooked, you will need to pour 2-3 tbsp water or stock into the wok and cover it, so the stems reheat thoroughly
Remove the stems from the wok and lay them neatly on a serving dish. If you wish to thicken the juices, give the potato flour mixture a stir and add just enough in stages, to thicken the sauce to a clingy consistency, then pour the sauce over the broccoli and serve. If you do not wish to thicken the juices, simply pour them and the ginger over the broccoli
