Once upon a wok, if you wanted to cook a fabulous Chinese vegetable dish then you’d need to haul yourself down to your local Chinatown to find the ingredients. But since the rise in popularity of Chinese cooking, major supermarkets now stock most of what’s required, including beautiful leafy Asian vegetables. Choi sum is one of my favourites. The colour alone is delicious enough to make your eyes water with its emerald gleam. The thick, crunchy stalks are packed with flavour and the leaves boast enough health-giving properties to make a jar of vitamins blush. The simplicity of this dish is its virtue – toss the choi sum around a wok with some basic Chinese seasoning and you are left with a health-conscious and very tasty dish … yum!