Traditionally, the recipe is given for halibut, but you can also use salmon, trout, wolf-fish or lumpfish, or other fatty fish.
1 1/2 kg fresh fish with bones, cut into pieces to fit in the pan
1 1/2 litre water
2 tbs white vinegar
2 tsp salt
2 bay leaves
50 g flour
100 ml cold water
1-2 tbs sugar
200 ml water
If the prunes are dry, soak them in water for an hour or so, or cook them in a little sugar-water with the zest of the 1/2 lemon until soft. Keep them whole.
Put water, salt, vinegar and bay leaves in a saucepan and bring to the boil. Add the fish. skim off the scum when the liquid boils again. cook the fish until it loosens from the bones. Strain the cooking liquid into another saucepan, leaving a little in the pan with the fish to keep it moist.
Mix together the flour and cold water into a smooth paste. Bring the strained cooking liquid to t…