Preheat oven to 450 degrees F. Lightly coat a baking sheet or pizza pan with 2 tablespoons olive oil.
Heat remaining 1 tablespoon olive oil in a large skillet over medium heat. Add Italian sausage and cook until browned, about 3-5 minutes, making sure to crumble the sausage as it cooks; drain excess fat.
Place into oven and bake for 15-20 minutes, or until the crust is golden brown and the cheeses have melted.
Serve immediately, garnished with basil, if desired.