Preheat the oven to 200C/180C ... To make the gravy, put the chicken granules, 150ml/5fl oz water, the remaining peri-peri sauce, jerk seasoning paste and jerk barbecue sauce in a small saucepan.

If you want to brine the chicken, put the salt, onion, rosemary, bay leaves and peppercorns in a big pot ... with barbecue sauce. Baste the chicken with this mixture and return to the oven ...