Place two cast iron skillets completely upside down on the middle racks of your oven. Preheat the oven to its highest setting (500°F - 550°F). Let the skillets preheat for 45 to 60 minutes.
Let the divided pizza dough rest at room temperature for 30 minutes to relax the gluten.
On a lightly floured surface, gently stretch or roll each dough portion into an 8 to 10-inch circle.
Dust a pizza peel generously with cornmeal. Place one stretched dough circle onto the peel.
Brush the crust edges with a little olive oil. Spread half the pizza sauce over the dough, and top with half the mozzarella and half the cherry tomatoes.
Open the oven and carefully slide the topped pizza directly onto the flat, hot bottom of the upside-down skillet. Repeat with the second pizza on the other skillet.
Bake for 8 to 12 minutes, or until the cheese is bubbling and the crust is golden and puffed.
Remove the pizzas carefully using a spatula or peel. Immediately top with the fresh basil leaves. Slice and serve hot!