Chilled avocado soup

• 2 ripe avocados
• 600ml/1pt chicken stock
• 2 tablespoons lemon juice
• 2 tablespoons chopped fresh chives
• 1⁄2 teaspoon chilli powder salt
• 2 tablespoons sour cream, to serve

1. Peel and stone the avocado. Blend or process the flesh into a purée. Add the remaining ingredients, except the sour cream, and blend until smooth. Allow to chill for a few hours before serving.
2. To serve, add the sour cream, stir through and serve the soup chilled