01 - Combine flour, powdered sugar, and salt in a food processor. Add cold butter cubes and pulse until mixture resembles coarse crumbs. Add egg yolk and pulse again. Gradually add ice water, one tablespoon at a time, until dough just forms.
02 - Shape dough into a disk, wrap with plastic wrap, and refrigerate for at least 30 minutes.
03 - Preheat oven to 350°F. Roll chilled dough on lightly floured surface to fit a 9-inch tart pan. Press dough into pan and trim edges. Prick bottom with fork.
04 - Line crust with parchment paper and fill with pie weights or dried beans. Bake 15 minutes, then remove weights and parchment and bake another 10 minutes until light golden. Allow to cool slightly.
05 - Whisk eggs and sugar until smooth. Add lemon juice and zest, then whisk in heavy cream until combined.
06 - Pour filling into cooled crust. Bake 18 to 20 minutes until filling is set but still slightly jiggly in center.
07 - Cool to room temperature, then refrigerate at least 1 hour.
08 - Top tart with fresh raspberries, dust with powdered sugar if desired, and garnish with mint leaves before serving.