Easy, once you get the hang of handling, stretching and folding the dough. Made with sourdough starter, this naturally fermented bread has a fluffy, airy interior and crackly crisp crust. 2. Also, fermenting overnight won't do: this bread dough proves over thirty-six hours and the result is a chewy, crusty and airy sourdough baguette. French style baguettes on sourdough levain instead of baker's yeast. This straightforward sourdough bread recipe is a staple in our house. Turn the machine off and close the cover, then let the starter rest as directed above. All the steps of making the bread are detailed out, as well as sourdough tips for beginners.