Preheat your oven to 425°F (220°C).
Rice the cauliflower using a food processor or box grater.
Steam the riced cauliflower for about 5 minutes to soften it.
Once steamed, let it cool for a few minutes, then squeeze out excess moisture using a cheesecloth or clean kitchen towel.
In a mixing bowl, combine the dry cauliflower, mozzarella, Parmesan, egg, oregano, garlic powder, salt, and pepper.
Spread the cauliflower mixture onto a parchment-lined baking sheet, shaping it into a round or rectangular crust.
Bake the crust in the preheated oven for about 25-30 minutes, or until golden brown and crisp.
Remove the crust from the oven, add your desired toppings, and bake again for another 10-15 minutes.
Let the pizza cool for a few minutes before slicing and serving.