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