01 - Set oven to 350°F and allow to preheat fully.
02 - Combine flour, powdered sugar, and salt in a food processor. Add cold, cubed butter and pulse until the mixture forms coarse crumbs.
03 - Add egg yolk and 2 tablespoons cold water to the mixture. Pulse until dough begins to come together, adding up to 1 more tablespoon water if needed.
04 - Turn out dough onto a floured surface. Form into a disk, wrap in plastic, and refrigerate for 30 minutes.
05 - Roll chilled dough to 1/8-inch thickness. Press into a 9-inch tart pan, trim excess, dock the base with a fork, and freeze for 10 minutes.
06 - Line crust with parchment, fill with pie weights, and bake 15 minutes. Remove weights, bake an additional 8–10 minutes until golden. Cool slightly.
07 - Reduce oven to 300°F.
08 - Whisk together heavy cream, granulated sugar, eggs, egg yolks, lemon zest, lemon juice, and salt in a mixing bowl until fully blended and smooth.
09 - Pour lemon filling into the baked shell. Bake 20–25 minutes, until edges are set and center remains just slightly wobbly.
10 - Allow tart to cool completely at room temperature and chill in the refrigerator for at least 1 hour before serving.
11 - Dust the surface with powdered sugar and add fresh berries or candied lemon slices as desired.