SLIMMER'S SOUP

Preparation Method :

• Remove 20 leaves from the watercress and reserve for the garnish. Chop the remaining watercress and stems.
• Heat the oil in a pan, add the onion and fry gently until soft and golden.
• Add the watercress the stock and bring to the boil. Lower the heat, cover and simmer for 20 minutes.
• Rub the soup through a sieve, or work to a puree in an electric blender. Put the egg yolks into a bowl and whisk in the yogurt. Stir in the puree and mix well.
• Pour the remaining puree into the rinsed-out pan. Add the yogurt mixture, stirring constantly, and then heat through gently without boiling. Add salt and pepper to taste.
• Pour into 4 individual bowls and garnish with the reserved watercress leaves.
• This soup may also be served chilled.