Knead 100 g sugar, butter and flour in a bowl with the dough hooks of the hand mixer to a shortcrust pastry. Form the dough into a ball and chill for about 30 minutes. Grease a springform pan (26 cm Ø). Roll out the dough (approx. 30 cm Ø), put it into the springform pan and press the rim. Prick the base several times with a fork. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see manufacturer) for 15-20 minutes, remove and let cool down
For the pudding, cut the vanilla pod in half lengthwise and scrape out the pulp. Mix 3 tablespoons of milk with the pudding powder. Bring the vanilla pod, pulp and 100 g sugar to the boil with the remaining milk. Remove the vanilla pod. Stir in the pudding powder and simmer for about 1 minute, remove from the heat and allow to cool
Spread the cooled shortcrust pastry with the fruit spread and pour vanilla pudding over it. Wash the blueberries, dab dry and spread on the pudding. Chill the cake for about 4 hours. Dust with icing sugar before serving
Waiting time approx. 5 hours