Serve this flavourful soup with a dollop of crème fraîche or soured cream and sprinkle with a few snipped fresh chives — or, on very special occasions, garnish with a small spoonful of caviar.

#Variation#

To make a low-fat soup, use low-fat fromage frais instead of crème fraîche or soured cream. Alternatively, leave out the cream altogether and thin the soup with a little skimmed milk.