Boil chicken, eggs and potatoes
Chop cucumbers, eggs, chicken.
Grate the cheese and potatoes.
Place the champignons head down on the plate; the plate should have sides.
Assemble the salad in the following order: cheese, chicken, egg, cucumber, coat each layer with mayonnaise. Add salt through the layer.
Place the last layer of potatoes with salt and mayonnaise.
Leave in the refrigerator for 2 hours.
Before serving, turn the salad onto a plate so that the mushrooms are on top.