Preheat oven to 420 degrees. Line a pizza pan or baking sheet with
Heat oil in a large skillet over medium heat. Add cauliflower and onion and sauté for 5 minutes. Add in water and cover. Cook for another 7 minutes.
Remove from the pan and spread out to cool. Transfer mixture to a food processor and pulse until grated.
Place cauliflower and onion on clean kitchen towel. Grabbing the edges, carefully ring out moisture.
Transfer to a large bowl and add in egg, cheese, Italian seasoning, garlic powder, salt and black pepper. Place mixture on the prepared pizza pan and gently press in.
Bake in the oven for 15 minutes. Remove from oven. Carefully lift parchment paper and wipe away any excess grease. Place a clean sheet of parchment on the pizza pan. Using your hands, carefully flip the crust back on to the pizza pan so that the other side is facing up. Cook for an additional 10 to 15 minutes.