Sweetened whipped cream or thawed frozen whipped topping
Garnish: orange zest, orange slice
Preheat oven to 350°.
In a medium bowl, stir together wafer crumbs and melted butter. Firmly press mixture into bottom and up sides of a 9-inch pie plate.
Bake for 12 minutes or until golden brown. Let cool completely.
In a large bowl, whisk together condensed milk and next 4 ingredients until smooth. Pour into cooled crust.
Bake for 15 to 20 minutes or until center has set. Let pie cool to room temperature, then refrigerate for at least 3 hours or until chilled. Top pie with whipped cream, and garnish with zest and orange slice, if desired.