For this you need a large, round or oval plate, not completely flat.
Remove skin, bones and fins from the herring, cut off the head and tail. First cut into strips, then into small pieces.
Boil the potatoes and carrots in their skins, peel them and let them cool. Dice the potato. Coarsely grate the beetroot and carrots. Boil the eggs hard, let them cool, cut into small pieces. Peel and chop the onion.
Place all the ingredients on the plate in heaps in the following order:
1st layer: herring
2nd layer: onion
3rd layer: potato
4th layer: carrots
5th layer: eggs
6th layer: beetroot
Brush the whole thing with mayonnaise, repeat the process. Sprinkle with cut eggs and parsley to taste. Place in the refrigerator for 2-3 hours.