Make the Crust: In a food processor, pulse together the gingersnaps and sugar until they become fine crumbs. Add the melted butter and pulse a few more times to incorporate. Press the crumbs evenly into a 9-inch pie plate. Bake for 10 minutes. Place on a wire rack to cool to room temperature, then place in the freezer while you prepare the filling.
Make the Filling: In a medium bowl, stir together the ice cream, cranberry sauce and orange juice until completely combined. Spoon the mixture into the prepared pie crust and smooth the top into an even layer. Freeze until firm, at least 4 hours.
Make the Whipped Cream Topping: When ready to serve, beat the cream and sugar in a chilled bowl at medium speed to soft peaks; add the vanilla. Continue to beat to barely stiff peaks. Spread or pipe the whipped cream over the chilled filling and garnish with sliced almonds, if desired. Serve immediately.
Notes
Note: You can make this ahead of time, just cover the pie with plastic wrap if you are going to leave it in the freezer for a few days. I would make the whipped cream the same day you plan to serve, but you can whip it in the morning, refrigerate it, and then top the pie just before serving.Nutritional values are based on one serving