I owe Tom Kerridge the inspiration for this one when catching him on breakfast TV cooking this with Pollock. The salting process with the fish draws all the moisture out of it giving it a firm texture more like meat. Originally it was the Basques who invented this curing method to preserve their catch, which was predominantly cod and caught in Newfoundland. In later years it helped sustain millions of slaves in their back breaking torture, harvesting sugar cane. Subsequently in modern days it is still incredibly popular in Northern Spain and the Caribbean.