Sour Cucumber Soup

Ingredients

 * 1 litre chicken stock
 * 2 med sized potatoes
 * 2 med sized cucumbers, pickled in brine
 * 25g butter
 * 150 ml sour cream
 * 1 tsp plain flour
 * salt and pepper to taste

Directions
Heat the stock. Peel and dice potatoes and boil them in the stock until soft. Peel the cucumbers and grate them coarsely. Melt the butter and soften the grated cucumber. Add to the stock and potatoes. Taste and add a little brine if necessary - the soup should have a pleasantly sour taste. Mix the sour cream with the flour and stir into the soup. Season with salt and pepper. Serve immediately without bringing back to the boil. Serves 4.