The next morning, pull your dough out of the fridge and allow it to warm up slightly.
Line a large bowl with a tea towel and dust it lightly with flour. Shape your dough into a ball, pinching the bottom together to create a seam. Place dough, seam side up, into the towel-lined bowl.
Cover with a kitchen towel or plastic wrap. Allow dough to rest and rise for about 2-4 hours, or until puffy and doubled (the time will vary quite a bit depending on your dough and the temperature).
Place a dutch oven and lid in the oven and preheat oven to 450° F. When oven comes to temperature, carefully turn your dough onto a piece of parchment, seam side down. Score the dough in any desired pattern.
Lift the parchment paper with your sourdough and lower it into the hot dutch oven. Cut away any excess parchment paper, put the lid back on, and bake covered for 25 minutes.
Remove lid from dutch oven and continue to bake uncovered for another 18-22 minutes, or until bread is golden and cooked through. The best way to tell if bread is done is to take its temperature with a meat thermometer - it should be about 205 - 215° F.
Remove from oven and gently lift bread out of dutch oven, using the parchment paper as handles. Allow to cool completely before slicing.