1. Preheat the oven to 400°F. Line a baking sheet with parchment paper.
2. Cut the cauliflower into florets and pulse in a food processor until fine.
3. Steam in a steamer basket 10 min.
4. Drain well on a towel-squeeze out moisture.
5. In a bowl, combine cauliflower, mozzarella, Parmesan cheese, oregano, salt, garlic powder and eggs.
6. Transfer to the center of a baking sheet and spread into a circle, resembling a pizza crust. Bake 20 min turning once after 10 min.
7. Add tomato sauce, toppings and bake 10 min.

*To make vegan use vegan Mozzarella, Parmesan cheeses, and egg.