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 - Blend in egg yolk and 2 tablespoons cold water. Pulse until dough starts to form, adding an extra tablespoon water only if necessary.
04 - Transfer dough onto a lightly floured surface, shape into a disk, wrap, and refrigerate for 30 minutes.
05 - Roll dough to 1/8-inch thickness. Fit into a 9-inch tart pan, trimming excess. Prick base with a fork and freeze for 10 minutes.
06 - Line crust with parchment paper and fill with pie weights or dried beans. Bake for 15 minutes, remove weights and parchment, then bake an additional 8–10 minutes until golden. Allow to cool slightly.
07 - Reduce oven temperature to 300°F.
08 - In a bowl, whisk together heavy cream, granulated sugar, eggs, egg yolks, lemon zest, lemon juice, and a pinch of salt until fully blended.
09 - Pour the lemon filling into the pre-baked tart shell.
10 - Bake for 20–25 minutes, until the edges are set and the center is just slightly jiggly.
11 - Cool to room temperature, then refrigerate for at least 1 hour before serving.
12 - Dust with powdered sugar and garnish with fresh berries or candied lemon slices as desired.