Preheat the oven to 200°C / 392°F.
Pound salt, sugar garlic, chilli & zest to a paste. Add the lime juice
Spatchcock the chicken, stab it all over, front and back with the pointy part of the knife.
Rub the lime and salt mix all over the chicken, front and back.
Leave to rest for an hour.
While the chicken is resting, prepare the piri piri sauce
Once it's been resting, grill in a grill pan or in a large pan, skin side down first on a medium high heat until the skin has turned crisp and brown.
Turn over and grill for another 5 minutes.
Remove from the heat and place the chicken on a ovenproof tray.
Take 2 tablespoons of the piri piri sauce and place in a bowl.
Rub the chicken with the 2 tablespoon of piri piri sauce and place in the oven and bake in the oven for 40-45 minutes, or until the juices run clear.
While it's in the oven, you can prepare the coleslaw and baked sweet potato wedges.