How to Make It
Place 1 piecrust into a 9-inch pie plate according to package directions; fold edges under, crimp, and prick bottom and sides of piecrust using a fork. Bake a one-crust pie following package instructions.
Combine 1/2 cup sugar and cornstarch in a heavy saucepan. Whisk together half-and-half and egg yolks. Gradually whisk egg into sugar mixture; bring to a boil over medium heat, whisking constantly. Boil 1 minute; remove from heat. Stir in butter, 1 cup coconut, and 1 teaspoon vanilla. Place plastic wrap directly on pan to cover and let stand for 30 minutes. Spoon custard mixture into crust, cover and chill 30 minutes or until set.
Using an electric mixter, beat whipping cream at high speed until foamy; gradually add 1/3 cup sugar and remaining 1 1/2 teaspoons vanilla, beating until soft peaks form. Pipe or spread whipped cream over pie filling. Garnish with toasted coconut if desired.