In a large bowl, blend the flour, salt and yeast together. Add the water and mix with a wooden spoon, or your hands for about a minute until there's no flour visible. The dough should be very sticky.
Cover the bowl with a clean towel or plastic wrap and let sit at room temperature away from windows for 12-24 hours. The dough will look bubbly and will have doubled in size.
Generously dust a smooth work surface and your hands. Remove the dough from the bowl - I find going in a circular motion around the dough the easiest and least frustrating as it is very sticky and resists leaving the bowl. Do not add more flour! This dough is not the same as traditionally made kneaded dough. Once the dough is on your work surface, tuck the edges under to make a domed loaf. Place on a piece of parchment paper. Sprinkle with a bit of flour and cover with a tea towel or plastic wrap. Let rest for 1-2 hours until roughly doubled in size.
Half an hour before baking, place a 4-6 quart lidded, oven proof heavy pot (cast iron is ideal) in the center of the oven. Set the oven to 450°F.
Using pot holders, remove the very hot pot from the oven and take the lid off. Make 3 5-inch parallel slits on the top of the dough with a sharp knife. Quickly and carefully, taking the parchment paper too if it's easier, lift the dough and drop it into the pot, being careful not to burn yourself. Using a pot holder, place the lid on the pot and bake for 30 minutes, then remove the lid and bake for another 20-30 minutes until golden brown and firm. Using a wooden spoon, carefully remove the bread from the pot and let cool on a wire rack. Let rest for 45-60 minutes before slicing.
Don't have a cast iron Dutch oven? You can still make this bread! I've had success using a large metal pot with a lid (both oven proof of course), and the bread was just as good although it took about 25% longer to bake in total. No biggy, your house will just smell amazing longer ;)