Fischbrötchen is a commonly consumed sandwich in Northern Germany, made with fish and a variety of other ingredients such as pickles, remoulade, onions, lettuce, or horseradish. The ingredients are typically placed in round or elongated bread buns, while the type of fish used in the sandwich is variable – herring, sprat, salmon, and mackerel are among the most common fish used in the preparation of this sandwich, which is commonly served at fast-food stands in the region.