Try to find herring fillets marinated in a mild, sweet brine for this quick-to-make refreshing first course.
Rinse the herring fillets thoroughly under running cold water and pat them dry with kitchen paper. Using a sharp knife, cut the fillets across into thin pieces. Peel the apple, cut it in half, then slice it in very thin half-moon slices. Spoon the soured cream into a mixing bowl and add the grated nutmeg. Season with salt and chilli powder to taste, then stir in the sliced herring, the onion an