Preheat Oven + Cast Iron: The next day, Preheat your oven to 500 F and place a
cast iron pan with the lid inside for 30 minutes - 1 hour. When you're ready to bake, remove your dough from the fridge. Cover your Tupperware/bread basket with a piece of parchment paper, and then place a cutting board over the parchment paper. While holding the parchment paper and cutting board against the Tupperware, flip it over and allow the dough to turn out.