Spatchcock the chicken and peel off the skin. With a sharp knife cut incisions into the chicken so the marinade can really absorb. Season chicken with salt.
In a bowl, mix all the tandoori mix together and then massage into the chicken. Leave for at least 24 hours.
Heat the grill to its highest setting. Preheat a griddled tray lined with foil and place the chicken under the grill or barbeque and cook for 45-50 minutes until cooked through. If flesh begins to burn turn heat down a little.
Leave to rest for 30 minutes then serve.
