01 - Preheat oven to 350°F.
02 - Combine flour, powdered sugar, and salt in a food processor. Add cold, cubed butter and pulse until mixture resembles coarse crumbs.
03 - Incorporate egg yolk and 2 tablespoons cold water. Pulse briefly until dough begins to form; incorporate additional water as needed for cohesion.
04 - Transfer dough onto a lightly floured surface. Shape into a disk, wrap tightly, and refrigerate for 30 minutes.
05 - Roll dough to 1/8-inch thickness. Press into a 9-inch tart pan, trim excess, prick the base with a fork, and freeze for 10 minutes.
06 - Line crust with parchment and fill with pie weights or dried beans. Bake 15 minutes, remove weights and parchment, then bake an additional 8 to 10 minutes until golden brown. Allow to cool slightly.
07 - Lower oven temperature to 300°F.
08 - Whisk together heavy cream, granulated sugar, eggs, egg yolks, lemon zest, lemon juice, and a pinch of salt until smooth and fully combined.
09 - Pour filling into the pre-baked crust. Bake 20 to 25 minutes or until the edges are set and the center has a slight jiggle.
10 - Allow tart to cool completely at room temperature, then refrigerate for no less than 1 hour before serving.
11 - Dust tart with powdered sugar and garnish with fresh berries or candied lemon slices as desired.