-If you don't have biscuits or cookies on hand for making the crust, you can make a quick crust by combining some walnuts, almonds, and a few dates in a food processor until it is a crumbly paste. This type of crust doesn't need to be prebaked but keep in mind that it won't be nice and crisp like a cookie crust.
-For a gluten-free version, simply use any kind of plain gluten-free cookie or biscuit.