Peel and core the apples. Cut 1 apple into thin wedges. Roll the other two. Drizzle the apples with lemon juice.
Beat the eggs with their cane sugar in a bowl. Stir in the oil and yogurt. Sift the flour, baking powder and cocoa over it and stir in. Fold the diced apples into the batter.
Line a 24 cm springform pan with baking paper and pour in the batter. Press the apple wedges into the batter on the edge of the pan. Bake the cake in the oven preheated to 180 ° C for 35-40 minutes.
Dust the cooled cake with powdered sugar and serve.