Prepare the tart dough by creaming the butter and powdered sugar until light. Mix in the egg yolk, then add the flour, almond flour, and salt until a soft dough forms.
Press or roll the dough into a 9-inch tart pan, trimming any excess. Chill the crust for 15 minutes while the oven preheats to 350°F (175°C).
Line the chilled crust with parchment paper and pie weights. Blind bake until lightly golden, then remove the weights and bake a few minutes longer until the base is fully cooked. Allow the crust to cool.
Meanwhile, combine the mango puree, lime juice, sugar, salt, and egg yolks in a heatproof bowl set over gently simmering water. Cook, whisking constantly, until the mixture thickens enough to coat the back of a spoon.
Remove from the heat and whisk in the butter until smooth and glossy. Strain the curd through a fine-mesh sieve for an extra silky texture.
Pour the warm curd into the cooled tart shell and spread evenly. Bake at 325°F (163°C) until the filling is just set with a slight wobble in the center.
Cool the tart to room temperature, then refrigerate for at least 4 hours or until completely chilled.
Before serving, decorate with fresh mango slices, berries, cherries, and piped whipped cream. Slice with a sharp knife and serve chilled.