Clean, wash and cut the leek into rings. Cut pineapple into pieces. Clean, wash and cut carrots into sticks. Cut the chillies lengthwise. Take out seeds, wash and cut into fine strips.
Clean, wash and cut the peppers into pieces. Peel ginger and garlic and chop finely. Wash the scampi thoroughly and dab dry with kitchen paper. Put oil in a hot wok, heat it up and cook the scampi for about 4 minutes, turning them over.
Pull up the scampi by the edge of the wok. Place the leek, peppers, ginger, chilli, carrots, pineapple and garlic in the middle of the wok and cook for 6-8 minutes while turning. Mix everything together, add Asia sauce, heat up and season to taste with salt and chilli powder.
Serve garnished as desired with lemon leaves and Asian chives.