Herring and Whole Grain Mustard Open-Faced Sandwiches

Dice the hard-boiled eggs finely.

Add the finely chopped green onions to the eggs.

Season the mixture with salt and pepper to taste, dress with mayonnaise, and stir well.

Cut the slices of rye bread in half. Lightly toast the bread on both sides in a dry skillet.

Let the bread cool, then spread the egg mixture onto each piece and top with a small dollop of Dijon mustard.

Cut the lightly salted herring fillet into small pieces and place them on top of the appetizers.