In a large mixing bowl, stir together the flour, salt, and yeast. Add the room-temperature water and mix with a rubber spatula until all of the flour is incorporated. The dough will be sticky and shaggy.
Cover the bowl with plastic wrap and let the dough rise on the counter at room temperature for 12 to 18 hours, until bubbly and risen.
When ready to bake, place a cast iron Dutch oven with its lid in the oven and preheat to 450°F. Make sure your Dutch oven is rated for this temperature and safe to preheat empty.
Generously flour your work surface and hands. Gently remove the dough from the bowl and shape it into a ball. There is no need to knead the dough.
Carefully remove the hot Dutch oven from the oven and take off the lid. Gently place the dough inside.
Cover with the lid and return the Dutch oven to the oven. Bake for 30 minutes.
Remove the lid and continue baking for another 15 to 20 minutes, or until the bread is golden brown and crusty.
Carefully remove the bread from the Dutch oven and transfer it to a wire rack. Allow it to cool before slicing and serving.
Notes
Plan ahead: This bread needs 12 to 18 hours to rise, making it a great overnight bread recipe.
Sticky dough is normal: Resist the urge to add extra flour. Flour your hands and work surface to make shaping easier.
Dutch oven size: A 5- to 6-quart Dutch oven works well. Make sure the pot and lid are rated for 450°F and suitable for empty preheating.
Check for doneness: The bread should have a deep golden crust. The center should register approximately 200–210°F on an instant-read thermometer.
Storage: Store completely cooled bread at room temperature for 1 to 2 days or freeze for up to 3 months.