Mix together the marinade ingredients and add the chicken pieces. Mix together well and leave to marinade for 24 hours.
To cook, remove the chicken from the marinade, shaking off any excess and pop them in a tray. Cover with foil and cook in Roccbox for 10-15 minutes (the time here will be a little dependent on the size of your thighs but check them after 10 minutes and recover and cook for longer if needed).
When the time is up, remove the foil and return the pan to Roccbox to allow the skin to crisp up beautifully – this will happen quickly so keep an eye on it!
Pop the spicy fennel salt ingredients into a pestle and mortar and grind until coarse.
Sprinkle over the salt and serve with lime wedges.