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.
Working on a surface that has been sprinkled with cornmeal, roll out the pizza into a 12-inch-diameter round. Transfer to prepared baking sheet or pizza pan.
Using a small ladle, spread pizza sauce over the surface of the dough in an even layer, leaving a 1/2-inch border.
Top with sausage, pepperoni, mozzarella and dollops of ricotta.
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.