Butterfly the chicken by removing the back bone then press down on the breast to even it.
Blend the marinade ingredients in a blender until you get a smooth paste.
Apply the marinade onto the chicken and leave to marinate for 30 minutes.
Transfer the chicken onto the Roasting Rack and Shield. It is ready to be roasted.
At the barbecue:
Preheat grill to 190°C for 15 minutes with the lid down.
Place the chicken with the Roasting Rack and Shield on Indirect heat and roast for 50-60 minutes until the internal temperature reaches 74°C. Check internal temperature using a thermometer.
Remove the chicken from the grill and allow it to rest for 10 minutes before carving.