How to Make It
Preheat the oven to 350°. Butter a 9-inch fluted tart pan with a removable bottom.
In a medium bowl, using a wooden spoon, stir together the melted butter, vanilla, almond extract, lemon zest, confectioners' sugar and salt. Gradually stir in the flour to form a smooth, soft dough. Place the dough in the center of the prepared pan. Using the tips of your fingers, evenly press the dough along the bottom and up the sides of the pan; it will be quite thin.
Bake the shell in the center of the oven for 12 to 15 minutes, or just until the dough is firm and lightly browned. Let cool completely before filling. Do not remove from the pan before the tart is filled and set.