Start by preheating your oven to 425°F (220°C). Line a baking sheet or pizza stone with parchment paper.
Grate the cauliflower using a food processor or box grater until it resembles fine rice. This will be the base of your crust.
Place the grated cauliflower in a clean kitchen towel or cheesecloth and squeeze out as much moisture as possible. This is key for a crisp crust—too much water and it won’t hold together.
In a large bowl, combine the cauliflower, egg, mozzarella, Parmesan, oregano, garlic powder, salt, and pepper. Mix until it forms a sticky, slightly gooey dough.
Transfer the mixture to your prepared baking sheet and shape it into a circle or rectangle about 1/4–1/2 inch thick. Press firmly so it holds together.
Bake for 20–25 minutes, until the crust is golden brown and firm to the touch. Keep an eye on it—every oven is a little different.
Remove from the oven, spread pizza sauce evenly over the crust, and sprinkle with mozzarella and your favorite toppings. Return to the oven for another 8–10 minutes, until the cheese is melted and bubbly.
Let the pizza cool for a few minutes before slicing—it helps the crust hold together better.