Cut the mushrooms into small cubes.
Grate the cheese on a fine grater.
Cut the cucumber into small cubes.
Heat a frying pan with vegetable oil over medium heat, add the mushrooms, and fry until cooked and golden brown.
Place the salad culinary form on a plate, put the grated potatoes on a coarse grater as the first layer, and tamp it down.
The next layer is mayonnaise.
Then add the mushrooms.
Place the cucumber as the next layer.
Spread mayonnaise again.
The final layer is cheese.
Carefully remove the cooking form so that the salad does not fall apart.