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Pickled herring, also known as bismarck herring, is a delicacy in Europe, and has become a part of Baltic, Nordic (Inlagd sill), Dutch, German (Bismarckhering), Czech (zavináč), Polish (śledzie w occie), Eastern Slavic, Scottish and Ashkenazi Jewish cuisine.
Most cured herring uses a two-step curing process. Initially, herring is cured with salt to extract water. The second stage involves removing the salt and adding flavorings, typically a vinegar, salt, sugar solution to which ingredients such as peppercorn, bay leaves and raw onions are added. In recent years, other flavors have also been added...