Defrost the blueberries and let them drain. Take the dough out of the fridge about 10 minutes before processing. Grease a tart tin (20 x 29 cm). Roll out the dough on a floured work surface to a size of approx. 22 x 31 cm and carefully place it in the tart tin, press the edges firmly.
Prick the pastry base several times with a fork. Line with baking paper, spread with dried peas. Bake in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for approx. 8 minutes until completely dry.
In the meantime, finely chop the chocolate. Stir jam until smooth and mix with berries. Stir pudding powder with sugar and 6 tbsp. milk until smooth. Boil up 300 ml milk in a pot. Add the pudding powder while stirring and bring to the boil.
Add chocolate and stir into the pudding with egg yolks. Leave to cool a little. In the meantime, whip the cream with the whisk of the hand mixer. Fold the cream into the pudding.
Remove the tart from the oven, remove the dried peas and baking paper. Pour in pudding cream and smooth it down. Fill 4 tbsp. berries into the pudding. Bake the tart at the same temperature for about 25 minutes.
Take out, let it cool down. Crumble the almond biscuits and spread on the tart with the remaining berries. Dust with icing sugar. Tarte tastes lukewarm or cold.