Put 3 ½ cups bread flour in the bowl of the food processor.
Add 2 teaspoons salt on one side and 1 teaspoon instant dry yeast on the other, you don’t want them to touch for now.
Cover with the lid and begin to process at medium/high speed.
Add 1 ⅓ cup slightly warm water through the feed tube as you begin counting 20 seconds. Either do it out loud or use the phone timer. You’re going to see the dough starts to come together.
Stop the machine after 20 seconds and see that it is not dry. It should be rough; make sure there are no spots of flour at the bottom. If it is dry, add 1 more tablespoon of tepid water.
Cover the bowl back and now process for 25 more seconds. It should be 45 seconds in total.
Transfer the dough to a dry bowl, cover it with plastic wrap, and put it in a warm spot or place for 2 hours. The dough rise will be very little; it will not double as with a classic kneaded dough, and that is fine.
Dump it onto a lightly floured counter, and divide it into 2 or 3 pieces.
With each piece, make some rough buns by cupping them with both hands until you have a smooth surface, cover them with a clean kitchen towel or loose piece of plastic wrap, and leave them alone for 20 minutes.
Flatten each piece of dough on the counter (flour it lightly if needed) and shape them into baguettes. I like to make them shorter and thicker.
Put them on an oven sheet pan lightly sprinkled with flour, polenta or oatmeal on the bottom, and dust the bread pieces with a bit of flour. Cover with a clean kitchen towel and let stand for 40 minutes.
About 15 minutes before baking, turn on the oven at 450°F (230°C). Have ready a roasting pan and a kettle of boiling water.
When the 40 minutes are almost over, put the roasting pan on the bottom rack of the oven and carefully fill it halfway with hot water. Close the oven door quickly. This creates steam that is great for developing oven spring that gives the dough a rapid burst of rise at the beginning, and helps to form a crackly crust.
Make 3 cuts or slits to each loaf with a lame (find where to buy it online in the Notes below) or a very sharp kitchen knife, and immediately put it in the oven.
Bake for 25-30 minutes, until golden brown and they sound hollow if you turn them over and lightly tap the bottom with your fingers.