First make the dough: Yeast, pour water, add sugar, leave to ferment for 15 to 20 min. add to yeast mixture 2 cups flour, knead. Add the butter, continue to knead the dough. The dough should not stick to the hands and the edges of the dish. Put in a warm place, cover with cloth, let rise. Now prepare the filling: Half the onion finely cut and half cut into half rings. Finely chopped onion fry until Golden brown and pour the mushrooms, cover and simmer, when the mushrooms are almost ready add salt, pepper and leave to fry until cooked. Potatoes cut into small cubes. Prepare the stuffing as You like.

Divide the dough in half. Roll out half and spread on a baking sheet on the middle of the dough spread the stuffing and distribute evenly throughout the dough, spread on top of potatoes, then arrange the onion cut into half rings, pour the mayonnaise on top of mayonnaise spread the mushrooms, then pour the beaten egg, then sprinkle grated cheese on a coarse grater.

The second half of the dough roll out and cover our pie and fasten the edges beautifully.

Our almost ready-a cake baked in the oven for about an hour.

Bon appetit!