Prepare two cast iron pans. Add 1-2 Tbsp of olive oil, as well as a sprinkle of red pepper flakes and Italian seasoning. Spread evenly on the bottom of the pan.
Divide the dough into two balls and press into the cast iron pans. The dough will shrink slightly so gently stretch wider than the end desired dimensions of the pizza. Allow to rise/rest for 30 minutes. (this step can be skipped, but you will end up with a doughier/denser crust)
While the dough is rising, shred your mozzarella. (pre-shredded is more likely to burn due to anti-caking agents, low-moisture will brown the best)
On the stove, place the cast iron pan on a burner at approximately medium heat. Cook the dough until the bottom of the crust is nicely browned. (take care not to overcook, as the pan will still be hot as you add toppings and you don't want it to burn).
Turn on the broiler and allow it to heat up while you add toppings.
Spread the pizza sauce over the crust and top with shredded cheese. Add any additional desired toppings at this time. (the broiler will cook most ingreidents satisfactorily, but if you are uncertain, slightly precook any onions, peppers, etc. Definitely precook chicken or beef if those are your preferred toppings)
Place the pizza under the broiler until the cheese is melted and well browned.
Allow to cool slightly before serving. Repeat the cooking process for the second pizza.