Heat oven to 450°F. Make pie crust as directed on box for One-Crust Baked Shell using 9-inch glass pie pan. Bake 9 to 11 minutes or until light golden brown. Cool completely.
In 2-quart saucepan, mix sugar, cornstarch and salt. Gradually stir in milk until well blended. Add chocolate chips and egg yolks; cook over medium heat, stirring constantly, until mixture is thickened. Remove from heat. Beat in cream cheese with wire whisk until smooth. Cover surface with plastic wrap; refrigerate just until cool, about 1 hour.
In large bowl with electric mixer, beat whipping cream and vanilla on high speed until soft peaks form. Reserve 1 cup whipped cream for topping. Fold remaining whipped cream into cooled chocolate mixture. Spoon evenly into cooled baked shell. Refrigerate 6 to 8 hours or overnight. Spoon or pipe reserved whipped cream over filling. Store in refrigerator.