01 - Preheat the oven to 350°F (175°C).
02 - In a food processor, combine all-purpose flour, powdered sugar, and salt. Add cold cubed butter and pulse until the mixture resembles coarse crumbs.
03 - Add the egg yolk and 2 tablespoons of cold water. Pulse until the dough starts to clump together, adding an additional tablespoon of water if necessary.
04 - Transfer dough onto a lightly floured surface. Shape into a disk, wrap securely, and refrigerate for 30 minutes.
05 - Roll the dough to 1/8-inch thickness. Gently press into a 9-inch tart pan. Trim any excess and prick the base with a fork. Freeze for 10 minutes.
06 - Line the chilled crust with parchment paper and fill with pie weights or dried beans. Bake for 15 minutes, remove weights, and bake an additional 8 to 10 minutes until golden. Allow to cool slightly.
07 - Lower oven temperature to 300°F (150°C).
08 - In a mixing bowl, whisk together heavy cream, granulated sugar, eggs, egg yolks, finely grated lemon zest, fresh lemon juice, and a pinch of salt until smooth.
09 - Pour the lemon filling into the pre-baked crust. Bake for 20 to 25 minutes until the edges are set and the center is just barely jiggly.
10 - Cool completely on a wire rack. Refrigerate for at least 1 hour before serving for optimal texture.
11 - Dust with powdered sugar and garnish with fresh berries or candied lemon slices if desired.