1 red chilli, finely sliced
small bunch coriander, leaves picked
陆 lime, juice only
4 button mushrooms, thinly sliced
1 spring onion, chopped
1 tsp brown sugar (demarara is good)
1 tbsp fish sauce
300ml/10陆fl oz vegetable stock, made with 陆 stock cube
75g/3oz frozen raw king prawns