Herring Paste with Walnuts

Description
In Romanian: Pasta de heringi cu nuci

Ingredients

 * 1 herring,
 * 12 ground walnuts,
 * 2 crustless slices of white bread soaked in water with a little vinegar,
 * 1/2 grated onion,
 * 1 teaspoon vinegar,
 * 3 tablespoon oil

Directions

 * 1) Wash the fish, skin and debone it. Then grind or chop very fine. Place the fish paste in a bowl and mix with the soaked and squeezed bread, gradully adding the oil.
 * 2) After the oil is used up, add the onion, vinegar, walnuts and mix well. Place the mixture on a long serving plate, shaping like a fish. Put the head and tail where they belong. Keep cold until serving.