Prepare a loaf pan or a dutch oven by spraying some cooking spray or coating with oil. Dust with cornmeal for easy release.
Mix the yeast and lukewarm water and set aside to activate the yeast, about five minutes. The yeast should start frothing and bubbling to indicate it's alive.
Add the flour and salt and mix until a loose dough forms. You won't be able to shape it at this time.
Oil a bowl or coat it with cooking spray and place the dough in it. Coat the top with a little more oil or cooking spray to keep the dough from drying.
Set aside in a warm spot in your kitchen to rise for an hour. After an hour the dough should have more than doubled.
Turn the dough out and using your hands shape it into a rectangle or oval loaf. If using a dutch oven you should shape it into a round.
Gently place the loaf into the loaf pan or dutch oven. Dust some flour on top, cover with a clean shower cap or with a kitchen towel°, and return it to the warm spot. to let the dough rise Let it proof or rise for another 45 minutes. If you are using a loaf pan the dough should easily form a nice dome during this time.
About 15 minutes before the dough has finished rising, preheat the oven to 450 degrees Fahrenheit.
Just before you put the bread in the oven place a small glass or other oven-safe pan filled with hot water on a lower rack of the oven.
Score the bread jbefore placing it on the middle rack in oven. I like to make a single score down the center, but you can also make three diagonal scores.
Bake the bread for 30 minutes. Remove to a rack and cool for an hour, then remove from pan and continue cooling on rack.
Slice and eat.