Canapés of tart, vinegar-pickled Bismarck herring fillets layered over buttered pumpernickel bread with crisp cucumber and fresh dill.
Butter squares of dark pumpernickel bread.
Place a thin slice of pickled cucumber on each bread base.
Top with a folded piece of pickled Bismarck herring.
Secure with a cocktail toothpick and garnish with fresh dill. Serve chilled.