In a large bowl, use a hand-held electric mixer to beat the cream cheese, Nutella, sugar, egg, and salt until smooth.
Stir in the hazelnuts.
Fit pie crust into a 9-inch pie pan . Fold the edges over and crimp or flute them.
Transfer batter to pie crust.
Bake for 30 minutes. Let cool.
Beat cream with an electric mixer. When it starts to thicken, gradually add the sugar. Add the vanilla. Keep beating until thick. Spread on top of pie.
Notes
Store leftovers in the refrigerator.Instead of making the fresh whipped cream, you can use 2 cups of Cool Whip.