In a food processor, process cauliflower until finely chopped.
In a microwave-safe bowl, cook cauliflower for five minutes or until tender. Using a juicer, squeeze out the moisture from the cauliflower a little bit at a time. Alternately, place cauliflower in a towel, and squeeze out excess water so it is completely dry.
In a bowl, mix cauliflower, salt, baking powder, oregano, eggs, and garlic, until well-combined.
NOTE: everyone but me seems to be able to use parchment paper without it sticking. In my experience, no matter what I do, it sticks like glue. Using a Silpat sheet works perfectly.
On a Silpat (or parchment-lined baking sheet), spread cauliflower dough out until it resembles a pizza (round or square). Make sure the crust is at least ½“ thick. Pinch the edges up to contain sauce to be added later. Bake for 40 minutes.
Top however you want and bake in a 450°F oven for 7 minutes or until cheese and toppings have baked.