Add the bread flour 1/2 cup at a time, whisking after each addition, until it is a smooth batter. Then trade your whisk for a wooden spoon and finish adding the rest of the flour to the batter. You will have a very soft light and tender dough. Add as little flour as possible, but you will have to add a little in order to handle the dough. Shape it into a ball. Put it in a large greased bowl, cover it, and place it in the oven with the light on for one hour.