Soused herring is a traditional dish made from herring fish that has been pickled in a mixture of vinegar, sugar, and spices. This method of preservation enhances the fish's flavor and extends its shelf life. The herring is typically filleted and marinated for several days, allowing it to absorb the tangy and sweet flavors of the brine. This dish is popular in various cultures, especially in Northern Europe, where it is often served as an appetizer or part of a smorgasbord. Soused herring can be enjoyed on its own or paired with bread, onions, and other accompaniments, making it a versatile addition to meals.