01 - In a food processor, pulse flour, powdered sugar, and salt until combined. Add cold butter and pulse until mixture resembles coarse crumbs. Add egg yolk and ice water; pulse until dough just comes together.
02 - Turn dough onto a lightly floured surface and form into a disk. Wrap in plastic and refrigerate for 30 minutes.
03 - Preheat oven to 350°F. Roll dough to fit a 9-inch tart pan. Press into pan and trim excess. Prick base with fork. Line with parchment and fill with baking weights. Bake for 15 minutes. Remove weights and paper, bake 10–12 minutes more until golden. Cool completely.
04 - In a medium saucepan, whisk together mango puree, sugar, eggs, egg yolks, and lime juice. Cook over medium-low heat, stirring constantly, until thickened (about 8–10 minutes). Remove from heat; whisk in butter until smooth.
05 - Strain curd through a fine-mesh sieve into a bowl for extra silkiness. Let cool for 10 minutes.
06 - Pour mango curd into cooled tart shell. Smooth top. Refrigerate for at least 1 hour, or until set.
07 - Garnish with fresh mango slices, mint, or edible flowers before serving, if desired.