Pain de Mie with a Starter

To make the starter: Weigh your flour; or measure it by gently spooning it into a cup, then sweeping off any excess. In a small mixing bowl, combine all of the starter ingredients, cover, and set aside for 8 hours, or overnight., To make the dough: Combine the starter with the dough ingredients — by hand, mixer, or bread machine — until the dough becomes cohesive and begins to leave the sides of the bowl. It will still be sticky but become smooth and slightly bouncy., Lightly grease a bowl, place the dough in it, cover, and let it rest/rise for about 45 minutes., Take out the dough, gently deflate it by folding it in onto itself, turn it over, and place it back in the bowl. Let it continue to rise for a further 45 minutes to an hour., When the dough has finished rising, take it out of the bowl and place it on lightly floured surface., Lightly grease the bottom and inside lid of a 13" pain de mie pan., Shape the dough into a log and place it in the pan., Cover the pan with plastic wrap and allow to rise to just before the dough gets to the top edge of the pan., Preheat the oven to 350°F., Remove the plastic, and place the pain de mie cover, which has been greased on the bottom side, gently onto the pan., Bake the bread for 45 minutes. The bread is done when its internal temperature registers 190°F on an instant-read thermometer., Turn the bread out onto a rack and cool it completely., Storage information: Store, well-wrapped, at room temperature for up to 5 days, or freeze for up to 3 months.