In a medium bowl, whisk together all sauce ingredients until well combined.
Cut the bread loaf in half lengthwise.
Spread the sauce over the cut sides of the bread.
Spread the mozzarella in an even layer over the sauce and sprinkle with the Parmesan.
Add your favorite pizza toppings.
Bake in a 400 degree F oven until cheese is melted and browning, about 10 minutes. Cut each piece in half and serve.