Stir-fries do not have to be complicated with numerous ingredients, as this simple recipe shows. Here, strips of pork fillet are marinated then stir-fried with green vegetables. Egg noodles make the perfect accompaniment.
Bok choy, a variety of Chinese cabbage or greens, has broad white stalks topped with large, dark green leaves. Like other dark green, leafy vegetables, it is a particularly good source of folate, a B vitamin that may help to protect against heart disease.