Hot And Sour Prawn Soup

Ingredients

- 1 onion
- 2-3 small green chillies
- 1 inch piece fresh ginger
- 65 g. mushrooms, sliced
- 1.5 litre chicken stock
- 2 tbsp. olive oil
- 1 stalk lemon grass
- 2 tbsp. vinegar
- 1 small bunch watercress
- 400 g. cooked prawn
- salt and pepper

 Method

Peel and chop the onion. Cut the chillies lengthwise, remove seeds and finely chop them. Peel and finely chop the ginger.Heat oil in a large heavy based saucepan over medium heat. Add onion, chillies and ginger, stirring frequently sauté until onions are soft, about 5 minutes. Add mushrooms and sauté for 2 minutes.Add stock, lemon grass and vinegar. Bring to boil, cover and simmer for 12-15 minutes.Meanwhile chop the watercress, discard the stalks. Add prawns and chopped watercress to the soup and simmer for 2 minutes. Remove the lemon grass and adjust the seasoning with salt and pepper.