Olivier salad the dressing — was a jealously guarded secret, but it is known that the salad contained grouse, veal tongue, caviar, lettuce, crayfish tails, capers, and smoked duck, although it is possible that the recipe was varied seasonally. The original Olivier dressing was a type of mayonnaise, made with French wine vinegar, mustard, and Provençal olive oil; its exact recipe, however, remains unknown. At the turn of the 20th century, one of Olivier's sous-chefs, Ivan Ivanov, attempted to steal the recipe. While preparing the dressing one evening in solitude, as was his custom, Olivier was suddenly called away on some emergency.
Open sandwich or "macka") consists of one piece of buttered bread, often whole-grain rye bread (, , ), topped with, for instance, cheese, cold steak, ham, turkey, shrimps, smoked salmon, caviar, hard boiled eggs, bacon, herring, fish fillets, liver pâté (, ), and/or small meatballs. This is typically complemented by some herbs and vegetables such as parsley, cold salad, thinly sliced cucumber, tomato wedges and/or pickled beets etc. on the same slice of bread. A condiment, such as mayonnaise, or mayonnaise-based dressing is also often included in some form. An old traditional replacement for butter on a piece of bread with herring