Pickled herring is a traditional dish made from herring fish that has been cured in a vinegar-based brine. This method of preservation enhances the fish's flavor and extends its shelf life. It is commonly enjoyed in various cuisines, particularly in Scandinavian and Eastern European cultures, where it is often served as an appetizer or part of a festive meal. The dish can be prepared in numerous ways, with variations including different spices, onions, and even fruits like apples or currants. Pickled herring is typically served with bread, potatoes, or salads, making it a versatile addition to many meals.