Pane lievito naturale de John Spottiswood

These are breads that are made with a starter instead of fresh yeast. A starter is a mixture of flour, water, and baker's yeast that been set out so that it can be colonized by airborne yeast and friendly bacteria. Starters lend a special character to the bread--sourdough bread, for example, needs to be made with a starter to acquire a sour flavor.