Traditional Polish Christmas Pickled Herring (Śledzie marynowane) is a festive appetizer featuring tender herring fillets marinated in a tangy, sweet-and-sour brine with onions, peppercorns, and bay leaves, layered in oil. Delicious served chilled on rye bread for the special Wigilia (Christmas Eve) feast, symbolizing prosperity and a blessed sea. 
 
Portion is about 12oz (320g)