Feed Your Starter: The evening before baking, feed your sourdough starter with equal parts water and flour. Let it sit at room temperature overnight to ensure it's active and bubbly.
Stretch and Fold: Wet your hands. Perform 8-10 stretch-and-fold motions (gently pulling one side of the dough and folding it over). Cover the bowl and let it rest for 30 minutes. Repeat this process for 3-5 rounds, depending on time.
Prepare the Loaf Pan: Grease a glass loaf pan with olive oil. Transfer the shaped dough into the pan. Cover with plastic wrap and let rest at room temperature for 30 minutes to 1 hour. After that, put it in the fridge to proof overnight for 12 to 24 hours.
Bake the Bread: Preheat the oven to 210°C (410°F). Cover the loaf pan with another loaf pan to trap steam. Bake for 30 minutes. Remove the cover and bake for an additional 25 minutes, or until golden brown.