Preheat your oven to 425°F (220°C).
Prepare the cauliflower by removing the leaves and stem, then chop it into florets.
Pulse the cauliflower florets in a food processor until they resemble rice or fine crumbs.
Transfer the riced cauliflower to a clean kitchen towel and squeeze out as much moisture as possible.
In a mixing bowl, combine the riced cauliflower, mozzarella, Parmesan, egg, garlic powder, Italian seasoning, salt, and pepper.
Line a baking sheet with parchment paper and spread the cauliflower mixture into a pizza shape, about 1/4 inch thick.
Bake the crust for 25-30 minutes until golden and firm to the touch.
Remove the crust from the oven and add your favorite pizza toppings.
Return the pizza to the oven and bake for an additional 10-15 minutes, or until the cheese is melted and bubbly.
Let the pizza cool for a few minutes before slicing and serving.