Made this a couple of times and love the recipe!
I made one small tweak. I didn’t have Xanthum gum laying around so I substituted chia seeds as a binder. Ratio by weight is 1 to 1. You want to mortar and pestle the seeds and add boiling water in a 2 parts water to 1 part chia seed and let sit for a minute or so. Here’s the site I got the substitution from: http://www.glutenfreeclub.com/substitutes-xanthan-guar-gum/.
I refrigerated and froze the pizzas prior to the last baking step and am trying to stock my freezer with these. But I keep eating them too quickly! Ones that I have tried from the freezer and fridge still taste great.