Place a piece of parchment paper over the frozen pie crust and fill with pie weights. Bake at 425F until the crust is lightly golden brown, about 15 to 17 minutes. Remove the parchment paper and pie weights, and brush the base of the dough with egg wash. Return to the oven and bake until fully baked, about 5 minutes more. Cool completely.
In the bowl of an electric mixer, whip the cream to soft peaks. Add the confectioners’ sugar and whip to medium peaks. Set aside.
In the bowl of an electric mixer, cream the peanut butter, cream cheese, and granulated sugar until light and fluffy, about 4 to 5 minutes. Add the vanilla and mix to combine.
Fold the whipped cream into the peanut butter base.
Pour the filling into the crust and smooth into an even layer.
Refrigerate the pie until the filling is quite firm.
Spread 3/4 cup Nutella on the top of the hardened peanut butter.
An alternative would be to use the Nutella as a base for the peanut butter.
Slice while still quite cold or frozen and serve cold.