On today's episode of Ketchup Issues Dave, Nastassia, and The Rest are joined by Arielle Johnson. She talks a bit about her forthcoming book, Flavorama, and answers lots of listener questions about fermentation. Lacto Fermentation! Cold Fermentation! Cacao Fermentation! Plus: hydrocolloids, STEAM vs STEM, dishwasher cooking & how to troubleshoot a barbecue sauce.

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