„In Hungary the fish soup (halászlé) is one of the most popular Christmas dishes. Fish soup (Hungarian: halászlé is hot soup prepared with mixed river fish, characteristic for cuisines of the Pannonian Plain and the Balkans, especially the wider region around the River Danube. The meal originates from Slavic cuisine. Traditionally, fish soup is prepared in small kettles on open fire by fishermen themselves.
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https://www.xpatloop.com/news/18881

some instruction in Hungarian…