Preheat the oven to 400°F (200°C).
In a mixing bowl, combine mozzarella cheese, Parmesan cheese, and beaten egg to form a dough mixture.
Spread the cheese mixture onto a parchment-lined baking sheet to form a pizza crust.
Bake the crust for about 10-12 minutes, or until golden brown.
Remove from oven and spread the Alfredo sauce evenly over the crust.
Top with sliced chicken, fresh spinach, and a sprinkle of garlic powder.
Return to the oven and bake for an additional 8-10 minutes, until the toppings are heated through.
Allow to cool slightly before slicing and serving. Enjoy your Alfredo Keto Pizza!