Of flour and the butter making crumbs, add a beaten egg, yogurt, baking powder and a little salt. Blended into a soft dough. Cut in rings leek stew until soft, add one egg and the feta cheese. The dough is divided in 2 parts. Each piece is rolled crust. With one sheet cover the bottom and sides of a greased and sprinkled with flour baking dish. On it is placed about 4/5 of the filling and top with a second crust edges of the two sheets are screwed. Top is coated with the residue of the filling, a fat or an egg. In the middle is made kominche (hole) and bake in preheated oven.