01 - Blend flour, powdered sugar, and salt in a food processor. Add cold butter and pulse until mixture resembles coarse breadcrumbs. Add egg yolk and 1 tablespoon cold water, pulsing until dough just comes together. Add remaining water only if needed. Shape dough into a flat disk, wrap in plastic, and refrigerate for at least 1 hour.
02 - On a lightly floured surface, roll chilled dough to fit a 9-inch tart pan. Press dough evenly into pan, trim excess edges, and prick base thoroughly with a fork. Refrigerate lined shell for 15 minutes while preheating oven to 350°F.
03 - Line chilled shell with parchment paper and fill with baking weights or dried beans. Bake for 15 minutes, then carefully remove weights and parchment. Continue baking for 10 minutes until crust is golden brown. Allow to cool completely before filling.
04 - Whisk together mango puree, whole eggs, egg yolks, sugar, and lime juice in a saucepan. Cook over medium-low heat, stirring constantly, for approximately 10 minutes until mixture thickens enough to coat the back of a spoon. Remove from heat immediately.
05 - Stir butter cubes into hot mango mixture until completely melted and smooth. For an extra silky texture, strain curd through a fine mesh sieve. Allow curd to cool slightly before pouring into tart shell.
06 - Pour mango curd into completely cooled tart shell, smoothing top with an offset spatula. Refrigerate for at least 1.5 hours or until filling is fully set.
07 - Arrange fresh mango slices, toasted coconut flakes, and mint leaves on set curd just before serving. Serve chilled with whipped cream or coconut sorbet if desired.