Preheat oven to 450F. Line a baking sheet with parchment paper.

In a food processor, process the cauliflower until it is finely chopped but not mushy. Place in a microwave-safe dish and microwave for about 8 minutes, or until cooked.

Place the cooked cauliflower into a tea towel and squeeze all the water out of it. You'll get quite a lot of water out.

Transfer the cauliflower to a mixing bowl and stir in egg, mozzarella, salt, Italian seasoning, and black pepper. Mix until combined.

Use your hands to transfer mixture to the prepared baking sheet and flatten it out into a large, thin circle.

Bake 15 minutes or until lightly golden. Remove from oven and top with toppings of your choice. Return to oven and bake another 10 minutes to melt any cheese, if using.