Bake the potatoes, or boil them in their skins.
When cooked, skin and mash them. Cook the fish in a covered greased dish in a medium oven, Reg 4/350°, until the bones and skin come away easily. Remove the skin and bones, flake the fish. Make a stiffish sauce with the butter, flour and flavoured milk, plus any liquid given out by the fish while it cooked. Mix the potato, fish, chopped ha