01 - Preheat oven to 350°F.
02 - In a food processor, blend flour, powdered sugar, and salt. Add cubed butter and pulse until the mixture is crumbly.
03 - Add egg yolk and 2 tablespoons cold water; pulse until dough just begins to form. Add extra water only if needed.
04 - Transfer dough onto a lightly floured surface. Shape into a disk, wrap in plastic, and refrigerate for 30 minutes.
05 - Roll dough to 1/8-inch thickness. Fit into a 9-inch tart pan, trim excess, prick 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, then bake an additional 8–10 minutes until golden brown. Cool slightly.
07 - Reduce oven temperature to 300°F.
08 - Whisk together cream, granulated sugar, eggs, egg yolks, lemon zest, lemon juice, and salt until completely smooth.
09 - Pour lemon filling into baked tart crust. Bake for 20–25 minutes, until edges are set but the center is just slightly jiggly.
10 - Allow tart to cool completely, then refrigerate for at least 1 hour before serving.
11 - Dust with powdered sugar and garnish with fresh berries or candied lemon slices as desired.