Remove the outer leek leaves and cut lengthwise into 4 strips. Cut the rest of the leek into very fine rings.
Place the coconut milk in a bowl and stir in the laos, garlic and ginger. Season with salt and pepper.
Distribute the leek rings among the centres of the lettuce leaves and place the cod fillets on top. Then pour on the coconut mixture. Fold the lettuce leaves over the fish and bundle with the leek strips.
Add the tea to the flavour booster. Put the rice, lemon grass and 350 ml of water in rice steaming tier and place on steaming tier 1. Place the fish wraps on the rice.
Set the timer for 20 minutes and cook the fish wraps and rice until done. (Stir the rice once after 10 minutes.) Remove the lemon grass from the rice before serving.