Whisk bread flour, yeast and salt together. Place in the mixer bowl and attach the dough hook.
Start mixer at low speed, then add the water and run mixer for 10 minutes. The resulting dough will be shaggy and quite wet.
Pour the dough on a clean surface covered with flour.
Divide the dough into 6. Make into balls. Sprinkle extra flour if necessary to work with it, but don't overdo it or the bread will be dry and hard.
Place on a baking tray (see suggestions in notes) sprinkled with cornmeal. Let it rise covered in a dark, warm place until the balls double in size (1 ½ hrs, aprox.)
Heat oven to 500 ºF (260 ºC). If your oven doesn't reach that temperature, go as high as it goes (results may vary).
Place an empty tray on the topmost rack in the oven, one on the bottom. Fill both with boiling water. The oven should be very steamy when you put the bread in the oven.
Place the tray with the bread in the center of the oven, between the trays with boiling water. Close the oven fast so the steam doesn't escape.
Bake for 20 minutes. Remove the trays with the water (be very careful), and bake the bread some more until they have a golden brown crust (7 - 10 mins aprox).