That's easy since I know it by heart now! I bought the book, "The New Artisan Bread in Five Minutes a Day," recommended on this thread. I also the same recipe at the New York Times Cooking web site. Others have posted this recipe before me, so I'm not taking any credit for it here. And I wouldn't be using it if I didn't read about it here first!
The cookbook gives a whole bunch of things that you can do with this basic recipe, which I've yet to explore.
Simple Crusty Bread
1 1/2 tablespoons yeast
1 1/2 tablespoons kosher salt
6 1/2 cups unbleached all-purpose flour (910 grams), more for dusting
Cornmeal
In a large bowl or plastic container (my plastic container is 6 qts.), mix yeast and salt into 3 cups lukewarm water (about 100 degrees). Stir in flour, mixing until there are no dry patches. Dough will be quite loose. Cover, but not with an airtight lid. Let dough rise at room temperature 2 hours (or up to 5 hours).
Bake at this point or refrigerate, covered, for as long as 2 weeks. (I prefer to refrigerate before baking. I find the dough easier to handle.) When ready to bake, sprinkle a little flour on dough and cut off a grapefruit-size piece with serrated knife. (Lightly flouring your hands helps too.) Turn dough in hands to lightly stretch surface, creating a rounded top and a lumpy bottom. (At this point, you can decide on the shape of the loaf -- round, oval, long, etc. I sometimes put the dough into my banneton for the 40 minute rest period.) Put dough on pizza peel sprinkled with cornmeal; let rest 40 minutes. Repeat with remaining dough or refrigerate it.
Place broiler pan on bottom of oven. Place baking stone on middle rack and turn oven to 450 degrees; heat stone at that temperature for 20 minutes.
Dust dough with flour, slash top with serrated or very sharp knife three times. Slide onto stone. Pour one cup of hot water into broiler pan and shut oven quickly to trap steam. Bake until well browned, about 30 minutes. Cool completely.