For the „Wild Preferment“:
IMPORTANT: Baking soda and food grade lye is NOT THE SAME! Baking soda won't give you quite the same crust and taste as food grade lye, but it is a good alternative. Using food grade lye (sodium hydroxide) can bring your breads/pretzels to the next level but you have to read the safety instructions very carefully before use!
* There are several ways to prepare and use Wild Yeast Water. Personally, I prefer to work with dried organic dates for the Wild Yeast Water and use an overnight "Wild Preferment" for the dough. The Wild Yeast Water is easy to prepare: add 150g of water and 6 chopped dates in a jar and let it ferment for a couple of days in warm temperatures, stirring time to time. After that add another 150g of water and a few more dates in the the jar and let it ferment for another 1-2 days. When it’s ready, the top will be foamy and the smell will resemble of a young wine. For this dough, spoon out of the jar 125g active yeast water, and store the rest in the refrigerator. If necessary, simply refresh it with fresh water and dates.