In a mixing bowl, combine ground chicken with shredded mozzarella, grated Parmesan, and egg. Add garlic powder, Italian seasoning, salt, and pepper, mixing thoroughly.
Spread the chicken mixture onto a parchment-lined baking sheet into a circular shape.
Bake for 20 minutes until the crust is golden brown.
Add desired toppings and return to the oven for an additional 5–10 minutes until cheese is melted and bubbly.
Notes
Store leftovers in an airtight container in the refrigerator for up to 3 days or freeze for up to a month without toppings.