6 spring onions, finely shredded
2 fresh lemongrass stalks, very finely sliced
1 garlic clove, peeled and crushed
1/4 tsp finely grated fresh root ginger
1 red chilli, deseeded and finely sliced (optional)
900 ml (1 1/2 pts) chicken stock, made with Bovril
60 g (2 oz) shiitake mushrooms
60 g (2 oz) mangetout
200 g (7 oz) raw tiger prawns, peeled and deveined
1 tbsp dark soya sauce
2 tbsp chopped coriander leaves