COLD AVOCADO SOUP

Steps:

• Heat the butter in a saucepan over moderate heat and stir in the flour.
• Cook for 2 to 3 minutes, stirring frequently. Add the chicken stock and bring to a boil, stirring frequently.
• Boil for 5 minutes, remove from the heat and allow to cool to room temperature.
• Peel and pit 3 of the avocados and combine them with the remaining ingredients in an electric food processor or blender. Add about 2 cups of the cooled chicken stock and puree until smooth.
• Pour the avocado mixture into the saucepan with the remaining chicken stock and stir to combine.
• Chill for at least 2 hours.
• Immediately before serving, peel, pit, and dice the remaining avocado.
• Serve garnished with the diced avocado and a dollop of sour cream if desired.