Lemon Meringue Pie Cookies Recipe

Place egg whites in a large bowl; let stand at room temperature for 30 minutes. Add vanilla and cream of tartar; beat on medium speed until soft peaks form. Gradually beat in sugar, 1 tablespoon at a time, on high until stiff peaks form. Cut a small hole in the corner of a pastry or plastic bag; insert a #24 star tip. Fill bag with meringue. Pipe 1-in. circles 2 in. apart onto parchment paper-lined baking sheets. Pipe one or two circles over the edge of the base, forming sides. Bake at 300 ° for 25 minutes or until set and dry. Turn oven off; leave meringues in oven for 1 hour. Meanwhile, in a small heavy saucepan over medium heat, whisk the eggs, sugar, lemon juice and peel until blended. Add butter; cook, whisking constantly, until mixture is thickened and coats the back of a metal spoon. Transfer to a small bowl; cool for 10 minutes. Cover and refrigerate until chilled. Just before serving, spoon lemon curd into the center of cookies. Refrigerate leftovers.