An overnight-proofed country loaf, all open crumb and deep, blistered crust.

Mix the starter with the water, then add the flour and combine into a shaggy dough. Rest 30 minutes (autolyse).
Sprinkle over the salt and work it in by hand until fully incorporated.
Over the next 2 hours, perform 4 sets of stretch-and-folds, resting 30 minutes between each.
Cover and leave to bulk ferment at room temperature for 4-6 hours, until visibly puffy.
Shape the dough into a tight round and place seam-side up in a floured proving basket.
Cover and refrigerate overnight, 8-12 hours.
Preheat the oven with a Dutch oven inside to 240C.
Turn the loaf out onto parchment, score the top, and bake covered for 20 minutes.
Uncover, reduce heat to 220C, and bake a further 20-25 minutes until deeply golden.
Cool completely on a rack before slicing, at least 1 hour.