At the end of the rising time, turn your rounds out onto a piece of parchment paper.
About half an hour before baking, place your empty dutch oven inside the oven and preheat to 450 degrees. At the end of the rising time, turn your rounds out onto a piece of parchment paper. Using a bread lame, razor blade, or sharp knife, make 2 deep diagonal slashes into the rounds. Carry the dough by the corners of the parchment paper like a sling and very carefully place it into the preheated Dutch oven.