You're likely thinking of horseradish, a pungent root vegetable that's an integral part of the Seder meal. It symbolizes the bitterness of slavery in Egypt.
Here's why it's significant:
* Bitter taste: Horseradish's sharp, burning taste represents the harshness and suffering endured by the Israelites during their enslavement.
* Symbolic connection: The root's strong flavor is meant to evoke the bitterness of their experience, reminding us of the importance of freedom and liberation.
During the Seder, horseradish is dipped in salt water, representing the tears of the Israelites, and eaten with matzah (unleavened bread), symbolizing their hasty departure from Egypt.
Hope this clarifies things!