In a big bowl mix the flour, salt and yeast together. Pour water into the bowl and using a spatula or a wooden spoon mix it until well incorporated. Cover the bowl with plastic wrap and let it sit on your counter for 12 to 18 hours. Preheat oven to 450 F degrees. Add your cast iron pot to the oven as it's heating and heat it as well until it's at 450 F degrees. Remove the pot from the oven and remove the lid from it. If you want to make sure your bread doesn't stick to the pot you can sprinkle some flour or cornmeal on the bottom of the pot. Flour your hands really well and also sprinkle a bit of flour over the dough. With your floured hands gently remove the dough from the bowl and roughly shape it into a ball. Take the ball of dough and drop it into the pot. Cover the pot with the lid and place it back in the oven. Bake for 30 minutes with the lid on, after which remove the lid and bake for another 15 to 20 minutes until golden brown. Remove the bread from the pot, it should fall out easily. Let cool completely before slicing into it and serving. Recipe Notes I used a small 3.5 qt Dutch oven. A small Dutch oven is better here so that the bread rises upwards, whereas if you were to use a big Dutch oven the bread would spread out over the entire surface of the pot. If the dough mixture is too dry, add a bit more water, the dough should be sticky, as seen in the video. To add other ingredients to the bread such as dried fruit, seeds, herbs or cheeses, add them in step 1 when mixing everything together.