Combine all the marinade ingredients in a large bowl, mix together then add the chicken.
Cover the bowl with cling film and leave to marinate for at least 1 hour, or up to 3 days. This can also be done in a large ziplock bag.
When ready to cook, heat a grill to 200? (400?, medium high)
Using a rack over a tray (standard grill pan), lay the chicken on to the rack and grill for around 7 minutes a side, or until the chicken begins to brown slightly. If unsure, check the finished temperature is 75 Celcius using a thermometer.
Serve immediately in pitta or wraps with salad, hummus or garlic mayo.