Place cauliflower in a food processor and pulse until it forms a powder. Some lumps are ok.
Microwave cauliflower powder for 3-4 minutes. Place the hot cauliflower in a dish towel and squeeze out all of the water. Place the dry cauliflower in a mixing bowl.
Add mozzarella and Parmesan cheese to the cauliflower. Lightly mix.
Add the egg and continue to mix until loosely combined. Once it starts to stay together, use your hands to knead the dough. Place dough on a nonstick baking sheet and form the shape you want.
Bake at 450 degrees for 8-11 minutes.
Remove from oven, add desired toppings and bake for an additional 5-7 minutes.