In a small bowl, combine the warm water, sugar, and yeast. Let sit for 5 to 10 minutes until foamy.
In a large mixing bowl, combine the flour and salt. Add the yeast mixture and olive oil. Mix until a dough forms, then knead for about 5 minutes until smooth and elastic.
Cover the dough and let it rise in a warm place for 1 hour, or until doubled in size.
Preheat the Blackstone griddle to medium-high heat. Lightly grease the cooking surface with olive oil.
Roll the dough into a 12-inch round on a lightly floured surface.
Sprinkle the cornmeal onto the griddle, then carefully place the dough on the hot surface.
Cook for 2 to 3 minutes until the bottom is golden brown and lightly charred. Flip the crust with a spatula.
Spread the pizza sauce evenly over the cooked side of the crust. Top with mozzarella cheese, Italian seasoning, and crushed red pepper flakes.
Close the Blackstone lid, or cover the pizza with a large metal bowl, and cook for 4 to 5 minutes until the cheese is melted and bubbly and the crust is crisp.
Remove the pizza from the griddle and scatter the torn basil leaves over the top. Slice and serve immediately.