01 - In a food processor, pulse flour, powdered sugar, and salt until combined. Add cold butter cubes 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 wrap and refrigerate for 30 minutes to firm up.
03 - Preheat oven to 350°F. Roll dough to fit a 9-inch tart pan. Press dough into pan, trim excess edges, and prick base thoroughly with a fork.
04 - Line crust with parchment paper and fill with baking weights or dried beans. Bake for 15 minutes. Remove weights and parchment, then bake 10-12 minutes longer until golden brown. Cool completely.
05 - In a medium saucepan, whisk together mango puree, sugar, eggs, egg yolks, and lime juice until smooth. Cook over medium-low heat, stirring constantly, until thickened enough to coat a spoon, about 8-10 minutes.
06 - Remove from heat and whisk in butter cubes until melted and smooth. Strain curd through a fine-mesh sieve into a clean bowl for extra silkiness. Let cool for 10 minutes.
07 - Pour cooled mango curd into the completely cooled tart shell. Smooth the top with an offset spatula. Refrigerate for at least 1 hour or until set.
08 - Decorate with fresh mango slices, mint sprigs, or edible flowers just before serving. Slice and serve chilled.