Put flour, baking powder, salt, 150 g sugar, 1 packet of vanillin sugar, eggs and butter in pieces on a work surface. Quickly knead to a smooth dough. Remove 1/3 of the dough and knead in the hazelnuts.
Place doughs wrapped in foil in a cool place for about 30 minutes.
Roll out the nut short pastry on a floured work surface to a circle (26 cm Ø) and place in a greased springform pan (26 cm Ø). Prick several times with a fork and bake in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see
manufacturer) Bake for 18-20 minutes. Remove from the oven, place on a cake rack and allow to cool.
Remove from the bottom of the springform pan and place on a plate. Wash and dry the springform pan and grease the base again. Roll out the rest of the shortcrust pastry on a floured work surface to a circle (26 cm Ø), place it in the mould, prick several times with a fork and bake in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see
manufacturer) bake for about 25 minutes. Remove from the oven, place on a rack and allow to cool.
Let strawberries thaw at room temperature. Then puree finely with a blender. Soak gelatine in cold water. Remove the bottom from the mould. Spread nut short pastry with jam.
Place the light pastry base on top. Close a cake ring firmly around it.
Mix quark, strawberry puree, 75 g sugar and 1 sachet of vanillin sugar well. Whip 200 g cream until stiff. Squeeze out the gelatine and dissolve in a small saucepan over low heat. Remove from the heat, allow 2-3 tbsp of the quark mixture to run in drop by drop and stir in immediately.
Now stir into the rest of the quark mixture. Chill for 2-4 minutes until the mixture begins to gel.
Fold in cream in portions. Pour into the cake ring on the cake base and smooth it down. Chill for about 4 hours. In the meantime, roast the flaked almonds in a pan without fat at low to medium heat while turning until golden brown, take them out and let them cool down.
Whip 600 g cream until stiff, while pouring in 2 sachets of vanilla sugar. Remove the cake ring from the cake. Spread the cream loosely all around the cake. Decorate the cake ring with the flaked almonds.
Arrange on a cake plate.