Soup: Hot and Sour Prawn Soup

Peel the prawns and set them aside. Put the shells into a large saucepan

Lightly crush the lemongrass and add the stalks to the pan with the stock, lime leaves and ginger. Bring to the boil, lower the heat and simmer for 20 minutes

Strain the stock into a clean pan, discarding the prawn shells and the aromatics. At the fish sauce, lime juice, garlic, spring onions, chili and mushrooms. Bring to the boil then lower the heat and simmer for 5 minutes. Add the peeled prawns and cook for 2 to 3 minutes. Serve, garnish with coriander leaves and lime slices