Wash the beetroot and boil in water for about 25 minutes. Peel, wash and dice the potatoes. Cook in salted water for about 10 minutes. Let cool down. Drain and slice the pickled herring.
Cucumbers likewise let drain and catch the liquid thereby. Cut the cucumbers into thin slices. Remove beetroot from the water and peel immediately. Leave to cool slightly and cut into wide sticks.
Mix mayonnaise, sour cream, milk and 2-3 tablespoons of gherkin liquid. Season with salt and pepper. Wash the dill, dab dry and chop finely, except for something to garnish. Stir into the sauce.
Mix all salad ingredients with the dill sauce. Arrange on plates and serve garnished with dill. Serve with pumpernickel with butter.