"This recipe is gluten free if prepared with GF oats, and is free of dairy or eggs so vegans can enjoy. It crisps nicely and tastes wonderful. Enjoy! I modified this recipe from many years of making crisps and any number of online versions of apple crisp. Serve warm with vegan ice cream."
If you have never worked with coconut flour: it is highly absorbent and you may find your crisp topping is too dry to work with. If so, add more oil. I don't recommend margarine or shortening because it is pretty toxic.
Corn or potato starch would be an okay substitution for the arrowroot powder.
Use your choice of sweetener, wet or dry. You can use a low-glycemic sweetener.