Microwave cauliflower crumbles 2-4 minutes and allow to cool (I believe this makes it easier to mix -- however, not precooking the cauliflower seems to make a less moist crust, which some may prefer). Add remaining ingredients and mix well.
Form the crust into a 9-12" round on a pizza pan coated with cooking spray (optionally you could use parchment paper).
Lightly spray top of crust and bake @ 450 for 15 minutes, or until golden.
Add sauce and toppings and cook an additional 3 minutes or until cheese is melted and toppings are warmed through.