from Jim Lahey's "My Bread"
3 cups bread flour
1 1/4 t. table salt
1/4 t. instant or other active dry yeast
1 1/2 cups cool (55 to 65 degrees F.) water (I needed more - just add enough until you get a "loose" consistency but not so wet that it can't be shaped)
additional flour for dusting
In a medium bowl, stir together the flour, salt and yeast. Add the water and, using a wooden spoon or your hand, mix until you have a wet, sticky dough, about 30 seconds. Cover the bowl and let sit at room temperature until the surface is dotted with bubbles and the dough is more than doubled in size, 12 to 18 hours.
When the first rise is complete, generously dust a work surface with flour. Use a bowl scraper or rubber spatula to scrape the dough out of the bowl in one piece. Dust the surface of the dough with flour and, with lightly floured hands, nudge the dough into roughly a 14 inch square. Fold the dough in half, and then crosswise in half again, so you have a square, roughly 7 inches on each side.
Place the dough in a warm, draft-free spot, cover it with a tea towel, and let rise for 1 hour. The dough is ready when it is almost doubled. If you gently poke it with your finger, it should hold the impression. If it springs back, let it rise for another 15 minutes.
Meanwhile, soak the clay baker for 10 minutes.
Half an hour before the end of the second rise, preheat the oven to 475 degrees F. with a rack in the center. Place the baker on the pizza stone, and put the stone and baker in the center of the rack.
Using pot holders, carefully remove the hot pot and stone from the oven, taking care not to set them on a cold surface. Using a dough cutter or sharp serrated knife, cut the dough in half. Shape each piece into a long flat loaf. Generously dust each loaf with flour (you will bake 1 loaf at a time). Pick up 1 loaf with both hands, quickly but gently stretch it to almost the length of the clay pot (roughly 10 inches) and place it on the stone. Using pot holders, cover the loaf with the inverted pot, and bake for 20 minutes.
Uncover the loaf and place the pot on another rack in the oven, to keep it hot for the second loaf. Continue to bake the first loaf for 10 to 20 minutes, checking the color of the loaf once or twice. It is done when the crust is a light chestnut color. Using pot holders, carefully remove the stone from the oven. Transfer the ciabatta to a rack to cool thoroughly, and bake the second ciabatta the same way.