Place yoghurt, eggs, lemon juice, sugar, vanillin sugar and oil in a mixing bowl. Mix with the whisk of the hand mixer. Mix flour and baking powder and stir in portions. Grease a springform pan (26 cm Ø) and sprinkle with breadcrumbs. Pour in the dough and bake in a preheated oven (electric: 175 °C/ gas: level 2) for 50-55 minutes. Cover the cake if necessary after half the baking time.
Leave to cool on a cake rack and remove from the tin. For the cream, whip 2 cups of cream until stiff, pouring in sauce powder. Place a cake ring around the cake and spread the cream on the cake and smooth it down. Peel the bananas and cut them into thick diagonal slices. Spread it all around the cream and press it down a little. Chill for about 30 minutes. In the meantime, roughly chop the chocolate and put it in a small pot with 100 g cream and the coconut oil. Melt at low heat while stirring. Let it cool down for about 15 minutes. Cover vanilla cream and banana slices with it. Chill the cake for 1-2 hours. Whip the rest of the cream until stiff and fill into a piping bag with a star-shaped spout.
In the meantime, roughly chop the chocolate and put it in a small pot with 100 g cream and the coconut oil. Melt at low heat while stirring. Let it cool down for about 15 minutes. Cover vanilla cream and banana slices with it. Chill the cake for 1-2 hours. Whip the rest of the cream until stiff and fill into a piping bag with a star-shaped spout. Decorate cake with cream tuffs and sprinkle with chocolate rolls as desired. Results in about 16 pieces
waiting time approx. 4 hours