Is broken yolks with sugar until foaming. Soda is dissolved in the yogurt. Yogurt is added to yolks and stir. Gradually add flour and cocoa. Of the finished mixture is baked in greased pan base diameter 25 cm. The mixture is ready to bake in a preheated oven. When the base is baked and cool is cut horizontally into 2 equal parts. The cream is prepared by stir cream with 1/2 cup sugar. Egg whites are broken down separately with the remaining 1/2 tea cup sugar hard snow. Both the cream and mix thoroughly mixed. With 1/3 of the cream is smeared between the bases and arrange some chopped strawberries. With the rest of the cream smeared cake top and base side. The cake is decorated with strawberries and grated chocolate.