COOK IT.
Place the salt on a large pan along with 8 litres (2.11 gal) of water. Bring to the boil to dissolve the salt, then remove from the heat and cool to 40°C (104°F). Add the herbs and aromatics, and once completely cool, cover and place in the fridge overnight.
To prep the whole turkey, start by removing the legs and wings. Remove the breast from the crown being careful to keep the skin in one piece (you could ask the butcher to do this for you). Set the legs, wings and carcass aside for use in making the gravy. Remove the brine from the fridge, and strain into a very large container. Place the turkey crown into the brine and keep in the fridge for 14 hours. Remove and rinse under cold, running water for 1 hour. Drain and pat dry with kitchen paper.
To prep the brined crown, finely chop all the herbs and mix with the salt. Open out the crown and sprinkle the herb mix evenly over the meat. Roll the crown up ensuring the turkey stays even in size, then tie the crown at 2cm (0.79 in) intervals with butcher’s string along the roll.
On the HUB or FUSION spit, attach your turkey using the forks. Ignite the grill and when coals are ready, place the bird on the top setting. Begin the spit and monitor the heat (topping up with coals as needed). A surface temperature on the bird of around 70°C (158°F) should be maintained. Once the core of the crown reads 65°C (149°F) on a probe thermometer, top up the coals one last time and lower the bird to the lowest setting to colour and crisp the skin.
Remove bird from the spit and rest for 10 minutes before carving. Reserve the juices for the gravy.
In the meantime, make the gravy. Remove the skin from the legs and wings and discard. Debone the legs and slice into 2-3cm (0.79 in - 1.18 in) thick pieces. Chop the wings into smaller pieces.
Preheat the oven to 220°C (428°F) and spread all the chopped bones and meat out onto a roasting tray. Roast until brown and caramelised. This may need to be done in batches. Do the same with the vegetables.
Place all the roasted bones and vegetables into a large pan along with the chicken stock and 1 litre (33.81 fl oz) water. Simmer for 2 hours, skimming the fat regularly. Strain through a sieve, then return the stock to a clean pan. Add any roasting juices reserved when carving the turkey. Reduce the gravy over high heat until a light gravy consistency is reached.