"The Mishna (Pesachim 2:6) speaks of chazeres as one of the herbs (vegetables) that can be used on Passover to fulfill one's religious obligation. It was not, however, uniformly adopted by all authorities.

Rabbi Isaac Luria, the 16th century mystic of German extraction, also known as the `Ari' (using the initials: ha-Ashkenazi Rabbi Isaac), is known to have used chazeres as one of the symbolic foods on his Passover table.

But, the equally great 18th century scholar, Rabbi Elijah of Lithuania (better known as `The Vilna Gaon'), did not place chazeres on his Seder table."

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Source: The Family Seder, Prepared by Rabbi Alfred J. Kolatch.

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