sourdough focaccia

Add white flour, water and sourdough to a bowl and mix everything together. Let it sit for 30 minutes. Add salt and fold. Add olive oil and DON'T mix, just ensure the dough surface is cover in olive oil. Let it sit overnight. Move the dough to a rectangular tray and let it sit for 4 hours, DO NOT transfer the olive oil to the tray. Bake garlics and rosemary in the oven for 20 minutes. Make wholes in the dough with your fingers, add the garlics and rosemary, and some more salt. Add some more olive oil on top, to get the classical focaccia crunchiness. Bake for 20 minutes. Let it cool for 20 minutes and serve.