01 - Set oven temperature to 350°F and allow to preheat fully.
02 - Combine flour, powdered sugar, and salt in a food processor and pulse to blend.
03 - Add cold, cubed butter and pulse until the mixture resembles coarse crumbs.
04 - Add egg yolk and 2 tablespoons cold water to the mixture, pulsing just until dough begins to form. Add the remaining water if necessary.
05 - Transfer dough to a lightly floured surface, shape into a disk, wrap in plastic, and chill for 30 minutes.
06 - Roll dough to approximately 1/8-inch thickness. Fit into a 9-inch tart pan, trim edges, prick bottom with a fork, and place in the freezer for 10 minutes.
07 - Line the chilled crust with parchment paper, fill with pie weights or dried beans, and bake for 15 minutes. Remove the weights and bake an additional 8 to 10 minutes until golden. Allow crust to cool slightly.
08 - Reduce oven temperature to 300°F.
09 - In a mixing bowl, whisk together heavy cream, granulated sugar, eggs, egg yolks, lemon zest, lemon juice, and a pinch of salt until thoroughly combined.
10 - Pour lemon filling into the baked crust and bake for 20 to 25 minutes, until the edges are set but the center remains slightly jiggly.
11 - Let tart cool completely at 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 before serving.