KOSHER SOURDOUGH BREAD RECIPES

Steps:

• In a large mixing bowl, combine the flour and salt.
• In a small mixing bowl, stir together 300 grams (about 1 1/4 cups) lukewarm tap water with the sourdough starter, then pour the mixture into the bowl with the flour mixture. Mix until just combined. Cover the bowl with plastic wrap and a tea towel and leave it to rise overnight, about 10 to 24 hours.
• The next day, generously dust a clean kitchen surface with flour. The dough should have risen considerably and you should see visible bubbling along the sides. The dough will be spongy and wet. Scoop the dough directly onto the surface, then dust with more flour. With lightly floured hands, gently fold the edges of the dough from the outside in, to form a round loaf. Dust a clean towel with yet more flour, sprinkle sesame seeds in a small area about the size of your loaf and place the dough on top of the seeds, seam side down. Lightly dust with additional flour, cover and allow to double in size, about 2 hours.
• Meanwhile, heat oven to 450. Place a covered enamel Dutch oven or heavy pot with a lid into the oven and allow it to heat for 30 minutes or so. Remove the pot from the oven, take off its top, and carefully invert the risen dough into it, so that the seam side is now facing up. (Alternately you can invert the risen dough onto a flour-dusted sheet of parchment paper and lower your loaf into your pot that way.). Put the top back on the pot and return it to the oven.
• Bake for about 25 to 30 minutes, then take the top off the pot and allow it to continue to cook until it is brown and crusty all over, an additional 20 minutes or so. Put the loaf on a rack to cool for at least 30 minutes before serving.

Steps:

• For the levain: Combine the all-purpose flour, whole-wheat flour, water and starter in a medium bowl and mix to combine. Cover and let sit at room temperature until bubbly and increased in volume by about 20 percent, about 8 hours.
• For the dough: Add the all-purpose flour, water and whole-wheat flour to the bowl of a stand mixer fitted with a dough hook. Weigh out 7 ounces of the levain (about 1 cup) and add to the mixer (discard any remaining levain). Mix on low until a shaggy dough forms. Cover the bowl and let sit at room temperature for 30 minutes.  
• Add the salt to the dough and mix on medium speed for 2 minutes; the dough should feel a bit sticky and wet but look smooth and very stretchy. Scrape the dough into a plastic or glass container about twice its size. Cover and let sit at room temperature until puffed, about 45 minutes.  
• Put the dough on a floured work surface, flatten it gently, then fold in thirds like a business letter. Transfer it back to the container. Cover and let sit at room temperature for 45 minutes.   
• Repeat the folding process one more time, transfer back to the container, cover and let sit at room temperature for another 45 minutes. After the third 45-minute rest, the dough should feel soft and pillowy; when pressed with a finger, it should leave an indentation that begins to spring back.  
• Gently scrape the dough onto a lightly floured work surface. Divide in half using a bench scraper. Shape each piece loosely into a round by gently tucking the edges under. Cover with a kitchen towel and let rest for 30 minutes.   
• Drape 2 kitchen towels into 2 medium (8-inch) bowls and dust very generously with flour. Dust the top of the dough rounds very lightly with flour and flip over using a bench scraper. Flatten one piece of dough into a circle, then fold the left and right sides of the dough over the center. Keeping tension in the dough, begin folding down from the top edge in 3 segments, sealing the bottom edge with the last fold. Loosely cup the dough and, using your hands and the tension between the board and the dough, pull the bread very slowly towards yourself while creating a taut ball. Gently flip the dough ball over and into one of the prepared bowls. Cover loosely with another kitchen towel. Repeat the process with the second piece of dough. Place both in a warm place to rise until about 1 1/2 times their size, 2 to 2 1/2 hours. 
• About 20 minutes before baking, position an oven rack in the lower third of the oven, put a 4-quart Dutch oven and lid on the rack and preheat to 500 degrees F. When preheated, carefully transfer the hot Dutch oven to a heatsafe surface with oven mitts (leave the lid in the oven). Flip one round of dough over into the Dutch oven. Using a sharp knife, scissors or bread lame, score the top of the bread in a cross or desired pattern. Return to the oven, immediately cover with the lid and bake for 20 minutes. Lower the temperature to 425 degrees F, uncover and bake until dark brown, about 10 minutes more. Transfer the bread to a cooling rack to cool completely. Return the empty Dutch oven to the oven, raise the temperature to 500 degrees F and let heat for 10 minutes before repeating the baking process with the second dough round.