Water Spinach in a Hot and Sour Dressing

Kangkung is a kind of water spinach, and the kangkung of Lombok is reckoned to be the best in Nusatenggara. It is vital that water where the kangkung is grown should be clean and free from pollution of any kind. Whatever the real situation is now, I am fond of kangkung, so much so that I buy it in London at a very inflated price. Use only the best-looking leaves, discarding the rest as well as the thick part of the stalk, which is hollow and can carry dirt inside. Wash every part that you a