Romaine, Little Gem, iceberg, round lettuce, or bags of mixed leaves all work well. You can also use watercress, spinach and pak choi. For a creamier tasting soup, stir in 100ml/3½fl oz milk just ...

If you're a fan of Chinese dishes, you'll have come across pak choi. It's a gorgeously fresh and crunchy leafy vegetable that makes a great addition to rice or noodle dishes, or a delicious side ...