Converting Commercial Yeast Recipes to Sourdough

Laurie Ashton is a Twitter friend who caught my attention with her recipe for sourdough challah. When Aleeza asked how to convert regular yeast recipes to sourdough I thought of Laurie, and sure enough, she came through with a clear and thorough explanation. Her guest post is below.
Convert Standard Yeast Recipes to Sourdough

Guest post by Laurie Ashton

I’m not a long-time sourdough baker – I’ve only been baking sourdough (wild yeast) bread for the last couple of years. Since I don’t digest commercial-yeasted bread well, I use sourdough exclusively, which also means trial and error in converting recipes to sourdough.