In the bowl of a stand mixer, add yeast, water, salt, and 5 cups of flour. Knead on a slow speed until the flour has started to combine. Increase speed to medium and gradually add in remaining flour until dough pulls away from the sides of the bowl.
Transfer to a lightly greased mixing bowl, cover with a towel, and let rise until double in size, about 1 hour.
Divide dough in half. Roll each half into a large rectangle. Roll up tightly from the long end. Place onto a lightly greased baking sheet or into a french bread pan. Cover and let rise 30-45 minutes.
Preheat oven to 375 degrees. Use a sharp knife to cut diagonal slashes on the top of each bread loaf, about 1/4 inch deep. Brush loaves with beaten egg.
Bake in preheated oven for 35-40 minutes, until golden brown.