Preheat oven to 475º F. Sprinkle cornmeal onto a rimmed baking sheet pan.
Spread pizza dough onto baking sheet pan, forming a large rectangle. Remove roasted garlic from bulb and add to a medium bowl with softened butter. Cream together to make a garlic butter spread to spread over the pizza dough.
Spread pizza sauce on top of garlic butter mixture. Top with grated cheeses and bake in the oven until crust has turned slightly golden around edges and the cheese has melted and become bubbly, about 15 minutes. Remove from oven and allow to rest for about 5 minutes.