His name is Sandor Ellix Katz, and in the USA he's known as the guru of fermentation and stoveless kitchen. We met him in Tuscany to talk about kombutcha, kefir, yogurt and many other fermented products.
Yogurt, kefir, kombucha, soy sauce, miso, tempeh: fermented products are present on every supermarket shelf. Fermentation is an ancient technique of conservation and purification of foods that is having a new day in kitchens everywhere.