1. In a large mixing bowl, combine the flour and water. Mix until just combined, then let it rest for 30 minutes.
2. Add the sourdough starter and salt to the dough. Mix until fully incorporated.
3. Cover the bowl with a damp cloth and let the dough rest for 30 minutes.
4. Perform a series of stretch and folds every 30 minutes for the next 2 hours.
5. Let the dough rise at room temperature for 4-6 hours, or until it has doubled in size.
6. Preheat your oven to 450°F (230°C) with a Dutch oven inside.
7. Shape the dough into a round loaf and place it on a piece of parchment paper. Score the top of the loaf with a sharp knife.
8. Carefully transfer the dough into the preheated Dutch oven. Cover and bake for 20 minutes.
9. Remove the lid and bake for an additional 25 minutes, or until the crust is golden brown.
10. Let the bread cool on a wire rack before slicing.