Heat oven to 350ºF. In food processor bowl with metal blade, combine vanilla wafers and 1/2 cup of the cashews; process until finely ground. Add butter; process just until crumbly. Press mixture in bottom and up side of 9-inch glass pie pan.
Bake at 350ºF. for 10 to 12 minutes or until edges are light golden brown. Refrigerate crust for 20 minutes or until completely cooled.
Spread 1 pint of the ice cream in cooled crust. Spoon or drizzle 1/2 cup of the ice cream topping over ice cream. Freeze about 30 minutes or until partially frozen.
Top pie with remaining pint ice cream, spreading evenly. Freeze at least 4 hours or until firm.
To serve, let pie stand at room temperature for 15 minutes. Cut into wedges; place on individual dessert plates. Top with remaining ice cream topping and cashew halves.