For the source text click/tap here: Avodah Zarah 38
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The Gemara discusses whether fish that was salted by a Nochri is forbidden because of "Bishul Akum." Chizkiyah maintains that it is not forbidden, while Rebbi Yochanan argues that it is forbidden. Rebbi Yochanan apparently maintains that salting the fish is considered like cooking the fish (see Rashi, DH v'Rebbi Yochanan).
We explore condiments and additives in late antiquity.