Rinse the chicken fillet and boil in salted water until tender, about 25 minutes over moderate heat. Cool the meat and cut it into cubes. Boil the potatoes and eggs, then peel and grate on a medium grater. Wash and dry green onions, iceberg lettuce and dill. Finely chop the dill and onion separately.
Start forming the salad. Place the champignons in a deep bowl, caps down, after draining the brine. Sprinkle mushrooms with chopped green onions. Spread the potatoes on top, add salt and coat with mayonnaise.
Continue adding layers. The next layer in the salad is Korean carrots; there is no need to coat them with sauce. Spread chopped chicken fillet on top, sprinkle with grated cheese and brush with mayonnaise. The final touch is chopped eggs, sprinkle them on the salad and moisten with mayonnaise.
Let the salad brew. To ensure that the salad is well soaked and takes the desired shape, cover the salad bowl with cling film and put it in the refrigerator for about 1.5 hours.
Remove the salad from the refrigerator. Prepare a flat dish, place lettuce leaves on it and only then turn the plate with the salad on the dish so that the mushrooms are on top. Lightly sprinkle the salad with chopped herbs for flavor and serve.