Combine the water, yeast, and salt in a large bowl and stir. Add the flour, and mix until it's thoroughly combined. Dough will be quite loose. Cover the bowl with a kitchen towel and let the dough rise at room temperature 2 hours.
Divide the dough into two or four balls. Shape the loaves however you'd like and place each shaped loaf on a parchment paper or a silpat lined baking sheet (a pizza stone also works well for this). Let the dough rest for 40 minutes.
Preheat the oven to 450 degrees F.
Place a broiler pan on the bottom rack of the oven. Slash the top of each loaf with a serrated knife three times. Pour one cup of hot water into the broiler pan and shut the oven quickly. Bake the bread for 20 minutes, or until the top is well browned. Let the bread cool completely before slicing.