Heat the oil on a high heat in a large frying pan and add the chicken. Cook for 5-6 minutes, turning regularly until the chicken starts to brown.
Whilst the chicken is cooking remove and wash the outer leaves from the little gem lettuces. You'll need 10 of the larger leaves. Pat them dry and arrange on a plate.
Add the carrots and mushrooms to the chicken and cook for a minute, then add in the garlic, ginger and chillies and cook for another minute.
Add in the soy sauce and honey and bring the mixture to a bubble. Allow to bubble gently for a couple of minutes until most of the liquid has evaporated. (Note 3)
Spoon the chicken mixture out into the lettuce leaves and sprinkle with sesame seeds, spring onion, and chilli slices.
Serve immediately.