Delicious served hot or cold, Watercress and Potato Soup is a culinary classic. Try our version of this healthy, low fat but tasty soup. It is packed with vitamins and makes a sustaining lunch when on a weight reducing diet.
1 medium onion, peeled and chopped
1.3 litres stock made from a powder or a light chicken stock
200g potatoes, peeled and chopped
200g watercress (2 bags)
Salt and pepper