over-cook for this spoils the fresh ilavour ofthe leeks. Sieve or liquidise and reheat. Top with the yoghurt or cream. Variations Cnrried Leek and Potato Soup Blend 2 to 3 teaspoons of curry paste with a little milk, add to the soup above and simmer for a few minutes. If using a small amount of left-over soup adjust the amount of curry paste. Watercress and Potato Soup Use only 2 small leeks and the leaves and tender stalks from a small bunch of watercress. Sieve or liquidise and top with freshly chopped watercress leaves. Cold Leek and Potato Soup Add a little milk or single cream to the cold sieved or liquidised soup plus a small quantity of white wine. Chill well.