preheat the oven to 375 degrees F (190 degrees C).
Beat egg and 1 tablespoon water together in a small bowl; brush over risen loaves.
Dotdash Meredith Food Studios
Use a sharp knife to quickly cut one long slash down the center of each loaf.
Dotdash Meredith Food Studios
Gently shake the cutting board to make sure the loaves are not sticking; use a spatula or pastry knife to loosen them if necessary. Slide loaves onto a baking sheet with a quick but careful motion.
Dotdash Meredith Food Studios
Bake in the preheated oven until loaves are golden brown and sound hollow when tapped on the bottom