I have only made cauliflower crust, but I'm assuming it is the same thing. You shred it, add shredded cheese, eggs, and spices. Then you lay it out, shape it into a pizza crust, and bake. After it's baked you treat it like a pizza crust, add your toppings and bake again.
One trick I found is to lay out the mixture on parchment paper placed over a baking sheet. After you bake it, it just comes right off like a pizza. The first time I tried it I laid it out on aluminum foil and it was stuck in places, burnt to the foil in places, and wouldn't come off neatly. With the parchment paper it is really neat and easy.