Cauliflower.
Cauliflower Pizza Crust: Worth its Wow in Gold - National Low Carb | Examiner.com

If you get a processor, you can add other veggies to the mix pretty easily. Cauliflower you can manage with a grater and some patience.


But seriously, if you get ahold of almond/coconut flour, don't waste it on pizza crust. Save it for things like pancakes where the flavor will actually enhance what you're eating.