01 - In a food processor, pulse flour, powdered sugar, and salt until combined. Add cold butter and pulse until the mixture resembles coarse crumbs. Add egg yolk and ice water; pulse until the dough just comes together.
02 - Turn the dough onto a lightly floured surface and form into a disk. Wrap in plastic and refrigerate for 30 minutes to firm up.
03 - Preheat oven to 350°F. Roll dough to fit a 9-inch tart pan. Press into the pan and trim excess. Prick base with a fork. Line crust 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 before filling.
06 - Pour mango curd into cooled tart shell. Smooth the top. Refrigerate for at least 1 hour, or until completely set.
07 - Top with fresh mango slices, mint leaves, or edible flowers just before serving, if desired.