Preheat oven to 350F. Grease a 9" shallow pie dish and set aside. Place graham crackers into food processor and pulse until crumble reach the consistency of coarse sand or sea salt. Transfer mixture to a large bowl and whisk in cinnamon. Add applesauce and stir until evenly wet and large chunks form. Using your fingers, press mixture into prepared pie dish to form a crust. Pack the crust down tightly and bake for 8 minutes. Transfer to a cooling wrack and allow to completely cool before using.
Chef's Note: Substitute any flavored graham crackers you like: chocolate, vanilla, or ginger.