Forshmak
Forshmak (Yiddish: פֿאָרשמאַק, Russian: форшмак), or vorschmack, from German Vorgeschmack ("foretaste") or Vorspeise ("appetizer"), also known as chopped herring, is a traditional dish of Ashkenazi Jewish cuisine, particularly associated with the Jewish communities of Eastern Europe, including Poland, Lithuania, Ukraine, and Russia. It is a savory appetizer made primarily from chopped salted herring, hard-boiled eggs, onions, apples or potatoes, and bread or soaked matzah, often seasoned with vinegar or oil.