Combine crumbs, sugar, and ginger. Mix well. Add melted margarine and mix until everything is well moistened. Reserve about 1/4 cup crumbs for top. Evenly and firmly pat out remaining mixture into bottom and up sides of a 9" pie dish. Bake in preheated 350 °F oven for 10 minutes or until set. Cool completely.
Use any graham crackers that are safe for your needs. I use my top 8 plus corn free Mock Graham Crackers.
Butter and Margarine: Butter is a dairy product made from cow’s milk. Margarine typically contains milk or soy, but there are milk-free and soy-free versions available.