Put it in a fish kettle, cover with water and boil slowly for half an hour.
There is a wall of old kitchen ranges, stoves and spits and shelves of gleaming antique copper kitchenware: raised pie and blancmange moulds, fish kettles, stock pots, skillets.
Scottish couples are ditching such wedding list staples as toasters, towels and fish kettles for a bottle or 12 of vintage Bordeaux or champagne.
My mother-in-law's recipe for eating them cold is simple: put the fish in a fish kettle and cover the whole with cold water.
I usually buy a whole salmon as I have a fish kettle.