01 - Combine bread flour and water in a large mixing bowl, mixing until just incorporated. Cover bowl and let rest 1 hour to allow flour hydration.
02 - Add active sourdough starter and fine sea salt to autolysed dough. Mix thoroughly until dough becomes cohesive and ingredients are fully distributed.
03 - Perform 4 sets of stretch and fold technique at 30-minute intervals over 2 hours. Keep dough covered between sets to develop gluten structure.
04 - Cover bowl and allow dough to ferment at room temperature 4–6 hours until approximately doubled in volume.
05 - Turn dough onto lightly floured work surface. Shape into tight round or oval loaf, creating surface tension.
06 - Transfer shaped dough to floured proofing basket seam side up. Cover and refrigerate 8–12 hours for cold fermentation.
07 - Preheat oven to 450°F with Dutch oven inside for thorough heating.
08 - Gently invert dough onto parchment paper. Score top surface with sharp blade. Transfer loaf with parchment into preheated Dutch oven. Cover and bake 20 minutes.
09 - Remove Dutch oven lid and continue baking 20 minutes until crust achieves deep golden brown color.
10 - Transfer bread to cooling rack. Let cool minimum 1 hour before slicing to preserve crumb structure.