Lox is salmon fillet that has been cured. In its most popular form, it is thinly sliced—less than 5 millimetres (0.20 in) in thickness—and, typically, served on a bagel, often with cream cheese and capers. Noted for its importance in Ashkenazic Jewish cuisine, the food and its name were introduced to the United States through Scandinavian immigrants, though it was popularized by Jewish immigrants.