Pour yoghurt into a bowl. 1 Wash and dry the cup and use it as a measuring cup. Melt the fat, let it cool down. Mix flour, cocoa and baking powder, sieve into a bowl (3 litre capacity). Mix in sugar. Add eggs, fat and mineral water, mix to a smooth dough with the whisk of the hand mixer. Put the dough into a greased springform pan (26 cm Ø) and smooth it down.
Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 20-25 minutes. Remove from the oven and let cool on a cake rack. Remove the base from the cake tin, place the cake ring or springform pan rim around the base. Soak gelatine in cold water. Peel and slice 3 bananas and sprinkle with 2 tablespoons of lemon juice. Mix yoghurt and vanillin sugar. Squeeze the gelatine, dissolve it, stir some yoghurt cream into the gelatine, stir everything into the rest of the yoghurt. Whip cream until stiff, fold in. Put 3-4 tablespoons of the cream on the bottom, smooth it down. Spread banana slices on top. Pour the rest of the cream on top and spread lightly dome-shaped. Chill for at least 2-3 hours.
Whip cream until stiff, fold in. Put 3-4 tablespoons of the cream on the bottom, smooth it down. Spread banana slices on top. Pour the rest of the cream on top and spread lightly dome-shaped. Chill for at least 2-3 hours. Chop the chocolate coating and melt carefully over a warm water bath. Remove the cake from the ring. Peel 1 banana, cut into slices. Sprinkle with 1 tablespoon of lemon juice. Decorate the cake with banana slices and jelly bananas. Put the chocolate coating in a small piping bag and decorate the cake with it. Sprinkle with pistachios
Remove the cake from the ring. Peel 1 banana, cut into slices. Sprinkle with 1 tablespoon of lemon juice. Decorate the cake with banana slices and jelly bananas. Put the chocolate coating in a small piping bag and decorate the cake with it. Sprinkle with pistachios