Mix 8 tablespoons of milk, pudding powder and 3 tablespoons of sugar until smooth. Bring the rest of the milk to the boil, remove the pan from the heat and stir in the pudding powder. Put back on the hot stove and let simmer for about 1 minute while stirring. Put the pudding in a bowl and cover the surface directly with foil. Let cool down for 2-3 hours
Melt butter in a pot. Coarsely chop the pecan nuts. Mix flour, sugar, nuts and 1 pinch of salt in a bowl. Add hot butter and knead into crumbles with the dough hooks of the hand mixer. Let it cool down and spread it on a baking tray lined with baking paper. Bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see manufacturer) for approx. 20 minutes until crispy. Let the finished crumbles cool down for 20-30 minutes
Coarsely chop the chocolate coating and melt it over a warm water bath. Weigh 350 g crumbles, crumble finely and mix well with the liquid chocolate coating. Spread the bottom of a springform pan (26 cm Ø) thinly with oil. Pour the crumble mixture into the mould and press it into an even base with a spoon. Chill for about 30 minutes
Soak gelatine in cold water. Peel the bananas, first cut them in half crosswise, then lengthwise. Spread the bananas with lemon juice and line the crumble base with the banana quarters in a circle. Whip cream and vanilla sugar until not quite stiff. Mix the pudding with the whisk of the hand mixer until creamy. Stir about half of the cream into the pudding. Squeeze the gelatine, dissolve and mix with 1-2 tbsp. cream. Stir the gelatine mixture into the remaining cream and fold in the remaining cream
Loosen the edge of the springform pan and spread the pudding cream on the base as a dome. Lightly crumble the remaining crumbles, sprinkle on the cream and press down lightly. Chill the cake for 2-3 hours
waiting time approx. 4 3/4 hours