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There’s a thin line between rot and fermentation, and that line might best be understood as an actual line, like the kind you’d find outside a nightclub. Rot is a club where everyone gets in: bacteria and fungi, safe or unsafe, flavor enhancing or destructive. When you ferment something, you’re taking on the role of a bouncer, keeping out unwanted microbes and letting in the ones that are going to make the party pop.
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