Watercress and Potato Soup

Light and peppery, this vibrant green soup is packed with iron and antioxidants. The potatoes give a delicious, starchy moreishness and also act as the thickening agent, but the beauty of the recipe is that the flavours are kept clean and fresh by using water as the base liquid. The soup can be made in advance, but if you’re planning to do this it’s essential to chill it immediately after cooking to keep its colour and freshness.