Ingredients
Method
- Combine starter, flour, water, salt, and oil. Stretch and fold four times over 2 hours.
- Transfer to a generously oiled 9x13-inch pan. Refrigerate overnight, uncovered.
- In the morning, dimple the dough deeply with your fingers.
- Drizzle liberally with olive oil and top with flaky salt and rosemary.
- Bake at 450F (230C) for 25-30 minutes.