Mix the jerk seasoning, garlic, ginger, lime zest and oil in a bowl. Using a sharp knife, cut slits in the skin of the fish and rub liberally with the marinade. Leave on a tray in the fridge for at least 1 hr.

For the salsa, combine all the ingredients, cover and leave to marinate at room temperature for up to 1 hr until ready to serve.

Put each fish on a sheet of foil, and bring the sides around to make an open-topped boat shape. Cook for 15-20 mins on a barbecue, turning halfway, or until cooked through. Alternatively, heat the oven to 220C/200C fan/gas 7 and bake the fish on a non-stick baking tray for 15-20 mins or until just cooked. Serve scattered with the extra coriander and the salsa on the side.