Grated Cake with Blueberries and Quark

INSTRUCTIONS

• 1
  Whip the softened butter together with the granulated sugar into a light and fluffy foam, this takes a few minutes. Add the egg yolk and whip until smooth. Now add the flour mixed with cinnamon, cardamom, and salt, and use a spatula or your hands to work it into a smooth and only slightly sticky dough. Wrap in cling film and let it firm up in the freezer for at least 2 hours.
• 2
  Once the dough is cold, preheat the oven to 180 °C and line a baking form of approximately 20x20 cm with baking paper. Prepare the filling. Mix the quark with the egg yolk, powdered sugar, starch, and scraped vanilla bean. In a separate bowl, whip the egg whites with a pinch of salt into very stiff peaks and carefully fold them into the quark mixture.
• 3
  Grate the frozen dough coarsely and sprinkle about 2/3 of it on the bottom of the prepared form. Then pour over the quark filling, smooth it out, and sprinkle with blueberries. Finally, sprinkle with the remaining grated dough.
• 4
  Place in the preheated oven and bake for about 50 minutes or until the top of the cake is golden. After baking, let it cool completely in the form, then remove it with the paper and cut into pieces.