Preheat your oven to 400°F (200°C).
Rice the cauliflower using a food processor or box grater until it resembles rice or tiny granules.
Steam the riced cauliflower lightly for about 5 minutes until tender, then let it cool slightly.
Once cooled, place the cauliflower in a clean kitchen towel and squeeze out as much moisture as possible.
In a mixing bowl, combine the riced cauliflower, mozzarella, parmesan, eggs, garlic powder, onion powder, salt, and pepper.
Spread the mixture onto a parchment-lined baking sheet, shaping it into a pizza crust approximately 1/4 inch thick.
Bake for 25-30 minutes, or until golden brown and firm to the touch.
In a separate bowl, mix shredded chicken with BBQ sauce until well coated.
Once the crust is baked, remove it from the oven and top with the BBQ chicken followed by additional mozzarella cheese.
Return the pizza to the oven and bake for an additional 10-15 minutes, or until the cheese is melted and bubbly.
Remove from the oven, garnish with fresh cilantro or parsley, slice, and serve warm.