Add your sourdough starter (it should float if it ... Quickly and carefully, take the preheated pan out of the oven. Scatter a little semolina into the pan and then add the pizza base.

We'd try this trick again the next time we bake sourdough bread in a Dutch oven. If we were out of rice, we'd use rice flour or semolina on the bottom of the loaf to keep it from sticking.