Step 1

Put all the marinade ingredients into a medium bowl, season with black pepper and whisk together. Add the prawns and king prawns, and stir to coat well. Transfer to the fridge and leave to marinate for 1 hour, or longer if you have time.

Step 2

Heat the sunflower oil in a large frying pan or wok over a high heat. Add all the prawns and their marinade and fry for 3–4 minutes, until cooked through, pink and slightly sticky.

Step 3

Remove the lemongrass, add the lemon juice, coriander and pak choi, and fry for 1 minute. Give the pan one last toss.

Step 4

Divide the prawns and pak choi between four plates, making sure that one unpeeled prawn is on each plate.