Mix and autolyze. Combine all ingredients except the salt in a large mixing bowl. Then, stir with a spoon or spatula to create a sticky dough. Cover with a damp tea towel or plastic wrap and rest for 30-60 minutes. (Autolyze: This rest period allows the flour to hydrate and begin developing gluten fully.)
Knead in the salt. After the resting period, measure and add the salt to the dough. Gently knead on the counter (or in the bowl) until the salt is mixed in. Put the dough in a clean, lightly greased bowl. Cover and let it rest at warm room temperature (80-90 degrees) for 1 hour.
Stretch and fold. After letting the dough rest for an hour, gently stretch and fold it, either in the bowl or on the counter. Then, shape the dough into a round ball again, cover it, and let it rest for another hour. Repeat this process two more times, with an hour between each fold. Finally, cover the bowl and let the dough rest for a final hour at warm room temperature.
Cool proof. Your dough should now have risen a bit, but it might not have doubled in size. It's time for the second proof, which means letting it rise in the fridge overnight. Sprinkle flour (especially rice flour) generously in a banneton or a bowl lined with a tea towel, and put the dough in it. Cover it tightly with plastic wrap and place it in the fridge for 12-18 hours.
Dutch oven technique for steam. The next part of the recipe that helps the wet dough's tendency to flatten out is steam. A Dutch oven is perfect for this as it traps the steam created by the bread as it bakes. If you don't have a Dutch oven, you can preheat a baking sheet in your oven and pour water on it to create steam.And finally, a secret ingredient called diastatic malt powder helps the dough spring up even more in the oven. It also helps brown the crust. Slash. Remember to preheat your oven to 425 degrees in the morning. You can either heat up a Dutch oven or use it cold. Sprinkle some parchment paper with cornmeal, then put your dough in the middle. Carefully remove the basket or bowl. You should have a round loaf with the bottom coated in cornmeal on the parchment. Sprinkle with flour again and make a few cuts with a sharp knife. Put the parchment sheet into a Dutch oven, whether it's hot or cold, and cover it with the lid.
Bake. Bake with the lid on for 30 minutes, then remove the lid and bake for 20 minutes more.
Cool. Take the bread out of the Dutch oven and remove the parchment. Let it cool for at least 3 hours before cutting.