Enjoy fantastic and unforgettable taste of simple combination of lemon grass, ginger, chillies, kaffir lime, green peppercorns, coriander and sesame oil.

1. Preheat the oven to 180°C/gas mark 4.

2. Bruise the lemongrass stalks to release the flavour. Peel and slice the ginger. Remove the seeds from the chillies and chop them finely.

3. Wash the pak choi and separate out the leaves. Trim and chop the shallots.

4. In a large bowl, combine the lemongrass stalks with the lime leaves, chilli, peppercorns, ginger, coriander seeds and leaves.

5. Add the shallots, pak choi, sesame oil, rice wine vinegar and 4 tbsp water to the bowl and mix together well.

6. Cut 2 squares of foil 30cm wide. Cut 2 pieces of greaseproof paper to the same size. Place 1 square of foil on top of each piece of greaseproof paper and fold them both in half, then open out flat again.

7. Spread butter across the middle of each opened foil wrap. In each opened wrap, lay a haddock fillet over the crease in the middle.

8. Place 1 of the foil wraps with the fish on top in a bowl, so the contents will be cupped and the marinade won’t run out once added.

9. Pour half the marinade over and around the fillet, then crimp the edges together to make a sealed bag with the fish and liquid inside. Repeat the process with the second bag of haddock fillet.

10. Carefully place the bags on a baking tray and place in the oven for 10 minutes - the bags will puff right up and the fish will steam.

11. Keep the bags sealed until you are ready to serve. Place the parcels on plates and open the wraps just before serving.