Grease an 8 1/2- × 4 1/2-inch nonstick loaf pan (or a small Pullman pan) with butter (grease heavily if you are not using a nonstick pan). Dust the surface of the refrigerated dough with flour and, using kitchen shears or a serrated knife, cut off a 2-pound (cantaloupe-size) piece. Dust with more flour and quickly shape it into a ball (form a gluten cloak, see notes) by stretching the surface of the dough around to the bottom, rotating the ball a quarter-turn as you go. Pro Tip: Most of the dusting flour will fall off; it's not intended to be incorporated into the dough. The bottom of the loaf may appear to be a collection of bunched ends, but it will flatten out and adhere during resting and baking. The correctly shaped loaf will be smooth and cohesive. The entire process should take no more than 20 to 40 seconds.
Elongate the ball into an oval and drop it, seam side down, into the prepared pan.
Cover loosely with plastic wrap and allow to rest at room temperature for 90 minutes. Pro Tip: You may not see much rise during this period, but more rising will occur during baking (oven spring). If you are using fresh dough, that has not been refrigerated, you only have to let it rest for 45 minutes. Preheat the oven to 350°F, with a rack placed in the center of the oven.
Brush the top of the loaf with egg wash.
Bake for about 50 minutes, or until medium golden brown and well set. Pro Tip: If you are testing the baked bread with an instant read thermometer, it will be about 205°F. (White bread will not form a hard, crackling crust.) Remove from pan. Pro Tip: If the loaf sticks, wait 10 minutes and it will steam itself out of the pan. Allow to cool completely about 2 hours, preferably on a wire cooling rack, for best flavor, texture, and slicing. Cutting into a hot loaf is tempting, but it won't slice well and may seem underbaked if you break into it before it's cooled. Store the remaining dough in the refrigerator in your lidded or loosely plastic-wrapped container and use it over the next 4 days. Pro Tip: Freezing. The dough can also be frozen in 2-pound portions in an airtight container for about 3 weeks and defrosted in the refrigerator before use.