Meanwhile, in 2-quart saucepan, beat cornstarch, 2/3 cup sugar and the salt with whisk. Beat in half-and-half, 1/2 cup whipping cream and the milk. Beat in egg yolks. Add white chocolate. Heat mixture to boiling, beating constantly with whisk. Reduce heat to medium; cook until pudding coats back of wooden spoon. Stir in 1 teaspoon vanilla. Pour pudding into cooled pie crust. Cover with plastic wrap. Refrigerate 4 hours.