01 - Pulse flour, powdered sugar, and salt in a food processor. Add cold butter and pulse until mixture resembles coarse crumbs. 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.
03 - Preheat oven to 350°F. Roll dough to fit a 9-inch tart pan. Press into pan, trim excess, and prick base with a fork.
04 - Line crust with parchment paper and fill with baking weights. Bake for 15 minutes. Remove weights and paper, then bake 10-12 minutes more until golden. Cool completely.
05 - Whisk mango puree, sugar, eggs, egg yolks, and lime juice in a saucepan over medium-low heat. Stir constantly until thickened, about 8-10 minutes. Remove from heat and whisk in butter until smooth.
06 - Strain curd through a fine-mesh sieve into a bowl for extra silkiness. Let cool for 10 minutes.
07 - Pour mango curd into cooled tart shell and smooth the top. Refrigerate for at least 1 hour until completely set.
08 - Decorate with fresh mango slices, mint leaves, or edible flowers before serving if desired.