Makes four long loaves. You can make the dough in one batch in a standard-sized standing mixer bowl if you are careful!
I have a hard time getting the water temperature right for yeast. One thing to know is if your water is too cool, the yeast will proof eventually; it will just take longer. So if you're nervous, err on the side of coolness.
In the bowl of a standing mixer, put the warm water, and mix in the sugar and yeast until dissolved. Let stand at least five minutes until it foams a bit. If the water is too cool, it's okay; it will just take longer.
Fit on the dough hook and add the salt, oil, and six of the cups of flour. Add the flour gradually, so it doesn't spurt all over the place. Mix and low and then medium speed. Gradually add more flour, one cup at a time, until the dough is smooth and comes away from the side of the bowl as you mix. It should be tender but not sticky.
Lightly grease a bowl and put the dough ball in it. Cover with a damp towel or lightly cover with plastic wrap and set in a warm place to rise for about an hour, until it's about double in size.
Flour a working surface. Divide the dough into four balls. Taking one at a time, roll, pat, and/or stretch it out until it's a rough rectangle about 9x13" (a little bigger than a piece of looseleaf paper).
Roll the long side of the dough up into a long cylinder and pinch the seam shut, and pinch the ends, so it stays rolled up. It doesn't have to be super tight, but you don't want a ton of air trapped in it.
Butter some large pans. Sprinkle them with cornmeal if you like. You can also line them with parchment paper. Lay the loaves on the pans.
Cover them with damp cloths or plastic wrap again and set to rise in a warm place again, until they come close to double in size. Preheat the oven to 375.
Give each loaf several deep, diagonal slashes with a sharp knife. This will allow the loaves to rise without exploding. Put the pans in the oven and throw some ice cubes in the bottom of the oven, or spray some water in with a mister, and close the oven quickly, to give the bread a nice crust.
Bake 25 minutes or more until the crust is golden. One pan may need to bake a few minutes longer.
Run some butter over the crust of the hot bread if you like, to make it shiny and even yummier.