For the herring salad, divide the Russians, remove the backbone and cut them into large cubes, as well as the rolled herring and the mackerel into equal pieces.
Peel the potato, celery, carrot and apple and dice them as well as the bell bell pepper and pickles, finely chop the onion and garlic. Mix all ingredients, mix sour cream and mayonnaise and fold in.
Season with salt and pepper and let stand overnight.
Arrange herring salad on green salad with core oil and garnish with hard-boiled eggs (slices), anchovy fillets, mayonnaise and caviar substitute.