Final answer:
The "Hillel sandwich" is a traditional food item eaten during the Passover Seder that combines matzah, maror, and charoset to symbolize the bitterness of slavery and the sweetness of freedom, and is named after Hillel the Elder.
Step-by-step explanation:
The term "Hillel sandwich" refers to a custom during the Jewish Passover Seder where matzah (unleavened bread) is eaten with maror (bitter herbs) and charoset (a sweet paste made of fruits and nuts), named after the ancient Jewish sage Hillel the Elder. Hillel would combine the matzah and maror to fulfill the prescription of eating the Passover offering "on matzot and marorim" (with matzah and bitter herbs) as written in the Torah. This tradition symbolizes the bitterness of slavery in Egypt combined with the sweetness of freedom, and the Hillel sandwich is eaten during the Seder meal as a reminder of this aspect of the Passover narrative. Passover Seder, matzah, and charoset are crucial components of this commemorative practice.