This recipe was in my Woman's World magazine, and it is so incredibly delicious! And very bad for you. But worth it for a splurge here and there (I made it for Paul on our anniversary).
In bowl, whisk together sweetened condensed milk and Nutella until blended. On medium-high speed, beat 1 1/3 cups cream until soft peaks form. Fold into chocolate mixture.
Stir chopped candy bars into mousse mixture. Transfer 2 cups to a freezer-proof bowl. Spread remaining mixture in pie crust; freeze pie and reserved filling for 1 hour. Mound reserved filling over top of pie.
Cover pie; freeze until filling is set, about 8 hours. On medium high speed, beat remaining 1 cup of cream until soft peaks form. Spread whipped cream over pie. If desired, garnish with additional sliced candy bars.