In a spacious mixing bowl, combine the all-purpose flour, powdered sugar, and a pinch of salt. Whisk these dry ingredients together thoroughly to ensure an even mixture.
Introduce the cold, cubed butter to the flour mixture. With your fingertips or using a pastry cutter, incorporate the butter into the flour until the texture resembles coarse crumbs, with no large chunks of butter remaining.
Create a well in the center of your crumbly mixture. Add the egg yolk and vanilla extract into this well.
Employ a fork to gently stir the wet ingredients into the dry mixture until the dough starts to come together.
Transfer the mixture onto a lightly floured surface. Knead the dough gently for just a few moments until it is cohesive, but be careful not to over-knead, as this will make the pastry tough.
Form the dough into a flat disk, wrap it tightly in plastic wrap, and refrigerate for at least 30 minutes to allow it to firm up.
After chilling, take the dough out and roll it on a floured surface to achieve a thickness of about 1/8 inch.
Carefully lift the rolled-out dough and lay it into a tart pan, ensuring it presses into the edges snugly. Trim any overhanging dough using a sharp knife.
Preheat your oven to 180°C (350°F). To prevent bubbling, gently prick the bottom of the pastry all over with a fork.
Bake in the preheated oven for 20-25 minutes, or until the crust is delicately golden. Once done, remove from the oven and allow to cool completely before filling with your choice of delicious fillings.
Notes
Once the tart shell is baked and cooled, fill it with a colorful array of fresh fruits, a silky custard, or a rich layer of chocolate ganache. For a touch of elegance, dust the top lightly with powdered sugar before serving.