For the base, knead all the ingredients into a classic 1-2-3 shortcrust pastry. Remove 1/3 of the dough and set aside.
Place the remaining dough in a well-greased tart pan (approx. 24 cm in diameter) and press it down with your hands. Then pull the dough up to an even edge with your fingers.
For the blueberry filling, wash the blueberries, drain them well and spread them on the floor. Then sprinkle the vanilla sugar and cornstarch evenly over the top.
Roll out the dough that has been set aside on a floured work surface. Cut even strips approx. 2 cm wide with a cutting wheel or knife (see video). Spread the strands of dough on the blueberry tart in a grid shape. You can shorten the dough strands depending on the required length.
Bake the tart in a preheated oven at 175 ° C top and bottom heat for 50 minutes. When the blueberry tart has cooled down, the blueberry layer will be sufficiently firm again.