Cut the mushrooms into cubes and fry in butter until Golden. When the liquid has evaporated, add salt and pepper to taste. Allow to cool.Put the first sheet of pita bread on the plastic wrap. Brush it with a thin layer of sour cream and sprinkle with chopped dill. Cover with a second sheet of pita bread and press lightly.Brush the second sheet of pita bread with sour cream and spread the fried mushrooms evenly over it. Cover with a third sheet of pita bread, press lightly.The third sheet of pita bread is also smeared with sour cream. Sprinkle with grated cheese.Roll the pita bread prepared in this way. Try not to press hard so that the pita bread does not crack. Wrap in plastic wrap and refrigerate for 2 hours.Then remove from the refrigerator, remove the plastic wrap and cut into portions.