Three recipes from “Stora boken om Smörgåsar och Smörgåstårtor” (The Big Book on Sandwiches and Sandwich Cakes) published by ICA Bokförlag in 1985
The Scandinavian open sandwich (Danish: smørrebrød, Norwegian: smørbrød, Swedish: smörgås or macka) consists of one piece of buttered bread, often whole-grain rye bread (Danish & Norwegian: rugbrød, Swedish: rågbröd), topped with, for instance, cheese, cold steak, shrimps, smoked salmon, caviar, hard boiled eggs, bacon, herring, fish fillets, liver pâté (Danish: leverpostej, Norwegian: leverpostei Swedish: leverpastej), 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.
Condiments, 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 is pork fat. There are many variations associated with the smørrebrød/smørbrød/smörgås and there are even special stores, cafés and restaurants (especially in Denmark) that specialize in them.