This soup can be served hot or cold. It is important not to cook the avocado for any length of time because it can develop a bitter flavour. Bring to the boil
1.5 L rich chicken stock, together with 2 stalks of celery, roughly chopped, several springs of parsley, left whole, 1/4 teaspoon nutmeg and a dash of chilli powder or nutmeg. Simmer for half an hour. Remove and discard the celery and parsley. In a large bowl, beat together 2 egg yolks and 1/2 cup cream (or lower fat and cholesterol content by substituting evaporated skim milk). Gradually add hot soup. stirring constantly so that the egg doesn't curdle. Return the mixture to the saucepan over low heat and continue stirring until the soup thickens somewhat. Mash or process the flesh of 3 avocados and stir into the soup until well blended. Serve.