This recipe is practically perfect. I do a overnight first rise and then a 24 hour-ish fridge proof. I must say that I cannot get my dutch oven up to 500F therefore I put icecubes in my dutch oven to help with that initial rise. The only thing to look out for is if there's too big of a chunk of ice cube it might keep a part of your bread from crisping on that side- therefore the crust might not be hard in one spot despite the bread being done.
Amazing! The dough can be wrapped in foil and left in the fridge so I can cook one anytime i wan one. It definately makes more than 2 cookies though. I would be tempted to add more banana thoguh.