Heat the oven to 450°.
Combine the cauliflower, starch, cheeses and garlic and mix well to incorporate completely.
Whisk the egg in a separate bowl then add it to the cauliflower mixture.
Sprinkle salt and pepper evenly over the mixture and mix again.
Carefully spread the mixture onto a baking sheet lined with parchment paper—using your hands to press it together and form a uniformly ¼-inch-thick rectangle or circle.
Slide the parchment paper onto a hot pizza stone or proceed to bake on the baking sheet.
Bake for 14 to 18 minutes, then use a spatula to flip the crust.
Allow it to bake for an additional 5 to 8 minutes.
After the crust is baked, add sauce or pesto, toppings and cheese, as desired, and bake until melted and warmed to preference.