Remove the wet dish towel and add all ingredients to the bowl (600g bread flour, 400g lukewarm water, 18g salt).
Using the paddle attachment on your stand mixer, mix for 30-60 seconds until a tacky dough forms. If not using a stand mixer, use a spoon and mix by hand until the dough comes together.
Cover with a wet towel or plastic wrap and allow to rise for 1 hour.
Gently fold the dough over on itself several times, then replace the towel or plastic wrap and allow to rise for 1 hour
Repeat previous step again for the third rise.
Let the dough rest for up to 8 hours. You can store this in the fridge if doing it overnight.
When you're ready to bake the bread, flour your work surface. Shape it into a rough ball and leave it seam-side up for 15 minutes.
Prepare your baking vessel. I use a dutch oven. Coat the bottom with 1 Tbsp olive oil, and sprinkle cornmeal across the bottom. This will make it easy to remove. Add the bread, seam-side down, to the dutch oven.
(Optional) Allow the bread to rise for 2 hours.
Preheat the oven to 500°F. Score the bread with a sharp knife or lame, cutting ½" deep. A large cut down the center works well, or a cross-hatch pattern.
Once preheated, turn the oven temperature down to 450°F. Place your baking dish with the lid on into the oven.
Bake 45 minutes.
Remove the lid and bake an additional 15 minutes until bread is golden brown and crusty.
Remove the bread from the oven and transfer it to a rack to cool.