Mix eggs, flour, milk, egg yolks, powdered sugar and salt to a dough. Rest for 15 min. Heat a little fat in a frying pan. Pour in a little batter, gradually bake 8 narrow pancakes. Place 2 pancakes in a greased gratin dish.
Mix powdered sugar and nuts together and spread evenly on pancakes. Cover with 2 pancakes.
Stir together confectioners’ sugar, cottage cheese, egg yolks and raisins. Spread the curd mixture on the pancakes, cover repeatedly with 2 pancakes. Spread them with apricot jam and sprinkle with cocoa powder. Top with a few flakes of butter and cover with the 2 remaining pancakes. Mix sour cream, vanilla sugar and 1 egg with a whisk and pour over the sweet lasagna. Bake in the oven heated to 180 °C on the middle shelf for about 35 minutes. Beat 3 egg whites until stiff, gradually adding 50 g of granulated sugar. Spread the sugared snow evenly over the lasagna and bake at 200 °C for about 8 minutes.
Arrange the sweet lasagna on plates.