To prepare the chicken breasts, slice them into strips and place in a mixing bowl.
Add all ingredients - except the pak choi and the salad leaves - to the bowl.
Mix well to cover the chicken and leave to marinate for 1 hour.
Once ready to cook, place a wok or frying pan over a high heat. Add the chicken strips gradually, without stirring - they need to be left still to caramelise on the outside.