Cover with plastic and allow to rise until almost doubled.
Put old pie tin or metal pan in bottom of oven.
Place one rack in the center of the oven.
Preheat oven to 400ºF.
Brush tops w/egg white wash and sprinkle with sesame seeds, then slash tops about 1/4″ deep. I find that using a serrated knife works best
Put the pan in the oven.
Working fast, spritz the loaves and the walls of the oven with hot water.
Working quickly and safely, dump the 1 cup of hot water in to the metal pan and close the oven door fast. You are trapping the steam in here. This is how you get that crusty bread exterior!
minutes later, spritz the bread and walls again closing the door fast.
minutes later repeat.
Bake for 15-17 min. rotating pan half way through baking till golden brown.