1-2 red chillies, de-seeded and diced, to taste, plus extra to garnish
2-3 tbsp Tom Yum paste, to taste
500ml reduced-salt fish or vegetable stock
Juice 1 lime, plus wedges to serve
8 chestnut mushrooms, thinly sliced
2 spring onions, thinly sliced
2 skinless and boneless Alaskan pollock or Atlantic pollack fillets
Handful of fresh coriander, chopped
Handful of basil or Thai basil, chopped
Method
Heat the oil in a pan, add the lemongrass, kaffir lime leaves and chillies and fry gently for a few minutes. Then add the Tom Yum paste and cook gently for a few minutes until it becomes aromatic.
Add the stock, 150ml water and lime juice and stir together.
Add the mushrooms and spring onions.
Add the fish and cook on a low heat for around 10 minutes. The consistency of the soup with be thin. Stir in half of the coriander.
Garnish with extra chillies, the remaining chopped herbs and serve with the lime wedges.