In a large mixing bowl, whisk together flour, salt and yeast. Add water and mix until a shaggy mixture forms. Cover blow with plastic wrap and set aside for 12-18 hours. Overnight works great.
Heat oven to 450 degrees
When the oven has reached 450 degrees, place a cast iron pot with a lid in the oven and heat the pot for 30 minutes.
Meanwhile, pour dough onto a heavily floured surface and shape into a ball. Cover with plastic wrap and let set while the pot is heating. Remove hot pot from the oven and drop in the dough. BE VERY CAREFUL HANDLING THE HOT POT. Cover and return to the oven for 30 minutes. After 30 minutes, remove the lid and bake an additional 15 minutes. Remove bread from oven and place on a cooling rack to cool. Makes one loaf.
Notes
See recipe in Pinterest for other flavor suggestions. I added lemon zest, gruyere cheese and rosemary to my loaf and it is delicious!