01 - Pulse flour, powdered sugar, and salt in a food processor. Add cold butter and pulse until coarse crumbs form. Add egg yolk and ice water; pulse until dough just comes together.
02 - Form dough into a disk on a lightly floured surface. 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 pan, trim excess, and prick base with fork. Line with parchment and baking weights; bake for 15 minutes. Remove weights and paper, then bake 10–12 minutes until golden. Cool completely.
04 - Whisk together mango puree, sugar, eggs, egg yolks, and lime juice in a medium saucepan. Cook over medium-low heat, stirring constantly, until thickened (8–10 minutes). Remove from heat and whisk in butter until smooth.
05 - Strain curd through a fine-mesh sieve into a clean bowl for extra silkiness. Let cool for 10 minutes.
06 - Pour mango curd into cooled tart shell and smooth the top. Refrigerate for at least 1 hour, or until completely set.
07 - Top with fresh mango slices, mint, or edible flowers before serving, if desired.