By Paul Gayler
These cloud-like cheese meringues not only taste great but also make a lovely presentation for this delicate, peppery-tasting pea soup.
Heat the butter in a heavy-based pan, add the onion and leek and cook gently for 4-5 minutes, until softened. Add the stock and bring to the boil. Add the peas and simmer until tender - the cooking time will depend on whether you are using fresh or frozen peas. Stir in the watercress, then pour the soup into a blender and blitz until very smooth. For a more refined finish, strain it through a f