Roll out the second part of the dough thinly, cut into strips simulating waves, and put on the filling. Leave a few small gaps between the strips for steam to escape. Fold the edges of the bottom cake over the cake and lubricate with egg.
From the remaining dough, cut out small circles and put them on the edge of the pie, imitating scales.
Grease the top of the cake with beaten egg and put it in the oven, preheated to 220 * C.