Preheat oven to 350°
1. Place the ginger snap crumbs and toasted walnuts into the bowl of a food processor fitted with a steel blade and process to create fine crumbs.
2. Pour the crumbs into a medium bowl, add the melted butter, and mix until well combined.
3. Place the crumbs in a 9-inch pie pan and press evenly over the bottom and up the sides.
4. Bake 10–12 minutes until set.
5. Remove from the oven and cool completely before filling.