Rinse the mushrooms, cut in half. Fry in sunflower oil for 5-7 minutes.
Cut pineapples into cubes and add to the mushrooms. Fry for another 7 minutes. Salt.
Put mashed potatoes in a mold.
Top with mushrooms with pineapples.
Add sour cream.
Sprinkle everything with grated cheese.
Bake in the oven for 10 minutes at 200 degrees C.