Wash chicken giblets. Bring to the boil with 3/4 litres of cold salted water. Clean, wash and coarsely chop the soup greens. Add the peppercorns and bay leaves and cook over a low heat for about 1 hour.
Clean, wash and cut the leek into very fine strips. Pour the stock through a sieve and put it back into the pot. Season to taste with ginger. Cook the leek strips for about 5 minutes. Finally heat up the prawns.
Whisk eggs, soy sauce and sesame oil. Pour in small portions through a sieve directly into the simmering broth. Do not stir! Serve immediately.