Dates
In the Talmud, Rabbi Abaye suggests that Jews should observe the New Year by eating foods that grow in abundance, thus symbolizing prosperity. These include dates, beets, gourds or pumpkins, and leeks. In addition to being sweet and symbolizing a "sweet year," the Hebrew word for date, tamar, is related to the word yitamu, and we say on Rosh Hashanah, "Yitamu hata'im" meaning, "May the wicked be removed."