"Tart, sunny, homemade lime curd fills a flaky pie shell. Topped with whipped topping and decorated with lime slices, this pie is elegant and delicious."
Bake pie shell according to package directions. Cool.
Cover limes with boiling water for 2 minutes. Drain, dry and cool. Zest limes to yield 1 tablespoon. Squeeze limes to yield 1/2 cup lime juice.
Combine lime zest, flour, cornstarch and sugar in a heavy saucepan. Stir in lime juice and boiling water; cook over medium heat, stirring constantly until mixture thickens but does not boil.
Stir a small amount of the hot mixture into the egg yolks; slowly add a little more of the hot mixture, then blend the egg yolks back into the hot mixture. Cook for 1 minute, stirring constantly.
Remove from heat and stir in butter. Cover the surface with waxed paper and allow to cool completely.
Pour cooled mixture into baked pie shell. Refrigerate for several hours or until set.
Top with whipped topping and decorate with lime slices.