Lox, often served on a bagel, is a fillet of brined salmon. It is a popular topping for bagels, particularly in Jewish cuisine and in the United States. Lox is typically made from the belly of salmon, which is cured in a brine solution containing salt, sugar, and sometimes additional seasonings like dill. The brining process helps preserve the fish and gives it a characteristic flavor and texture. Lox is typically sliced thinly and served cold, often with cream cheese, red onions, capers, and other accompaniments on a bagel or bread.