01 - In a large bowl, mix bread flour and water until just combined. Cover and let rest for 45 minutes to develop gluten structure.
02 - Add sourdough starter and sea salt to the dough. Mix thoroughly by hand until fully incorporated and smooth.
03 - Cover the dough and let rest for 30 minutes to allow the flour to hydrate completely.
04 - Perform 4 sets of stretch and folds every 30 minutes: gently stretch one side of the dough and fold it over itself, rotating the bowl as you go. This builds strength and structure.
05 - After folding, cover and let dough rise for 4-6 hours at room temperature until roughly doubled in size.
06 - Lightly flour work surface. Turn out dough and gently shape into a round or oval loaf, creating surface tension.
07 - Place shaped dough seam side up in well-floured proofing basket or bowl lined with towel. Cover and proof 2-4 hours at room temperature, or refrigerate overnight 8-12 hours for enhanced flavor.
08 - Preheat oven to 450°F with Dutch oven or heavy lidded pot inside for at least 30 minutes.
09 - Turn dough onto parchment paper, score top with sharp blade, and carefully transfer to hot Dutch oven. Cover and bake 25 minutes.
10 - Remove lid and bake additional 20 minutes until deeply golden and crusty. Internal temperature should reach 200-210°F.
11 - Cool completely on wire rack for at least 1 hour before slicing to allow interior to set properly.