In a large bowl, dissolve the yeast in the water. Add 1 cup of bread flour and the whole wheat flour. Stir. Add the salt and the rest of the flour. Stir the ingredients until just combined. It will look ugly and shaggy. That's ok.
Cover the bowl with plastic wrap. Allow the bowl sit for a minimum of 8 hours, but 12-18 are preferable. I start this process the night before I want to eat the bread.
Flour a work surface and your hands. Sprinkle a bit of flour around the inside of the bowl, and remove the dough from the bowl. Sprinkle the dough with flour, and fold it over itself once or twice. Cover loosely with the plastic wrap from the bowl, and let it rest for about 15 minutes.
Flour your hands, and shape the dough into a ball. I gently work the dough until there are no sticky parts left. Generously coat a towel with flour and put the seam of the dough down on the towel, dust with more flour, and cover with the rest of the towel. Allow to rise for 1-2 hours.
At least 20 minutes before the dough is ready, preheat the oven to 450 degrees. Place a sheet of parchment inside your dutch oven and put the lid on it. Place the dutch oven in the oven while it is preheating.
After the oven comes to the proper temperature, remove your baking dish and uncover. Then, slide your hand under the towel in the dough bowl, and carefully put the dough into the pot, seam side up. Cover and bake for 30 minutes.
Remove the lid, and then bake another 15 ish minutes until the top is browned and crusty. Remove the bread without burning your hands on the pot that is the temperature of lava, and let the loaf cool on a wire rack for about an hour. Allow to fully cool before slicing.
Courtesy of Mother Earth News, adaptations by me.