Everyone is obligated to eat a Kezayit (olive’s volume, approx. 27 grams) of Maror on the night of Pesach. There are several kinds of vegetables that one may use for Maror, however, the predominant custom today, especially among Sephardic Jewry, is to use the leaves and stalks (spines) of Romaine lettuce to fulfill the Mitzvah of Maror.
Some Acharonim point out that one should not use romaine lettuce to fulfill the Mitzvah of Maror since it is not especially bitter. Indeed, the Talmud Yerushalmi states that the characteristic of Maror is that it sweet in the beginning but has a bitter aftertaste; however, lettuce is not bitter at all. Maran Rabbeinu Ovadia Yosef zt”l deals with this matter lengthily and concludes that halachically speaking, one should use romaine lettuce to fulfill the Mitzvah of Maror and it is indeed preferred over any other vegetable. With regards to the Talmud Yerushalmi’s statement that Maror has a bitter aftertaste, this refers to the beginning stages of the lettuce’s growth when it is sweet; however, when left to grow for a long time, the leaves become extremely bitter and inedible.
Caution Regarding Worms and Insects
One should be extremely careful when eating lettuce leaves to only use lettuce that was specially-grown to be worm-free, in which case a thorough washing to remove flies and the like will be sufficient to permit it for consumption. (When buying these leaves, one must be extremely careful that this lettuce should be under reliable Kashrut supervision, for unfortunately it is common in certain places that lettuce will be packaged in a plastic bag and marketed as though it were worm-free.)
However, if such lettuce which was specially-grown is not accessible, it is better not to eat the lettuce leaves at all; rather one should eat only from the white lettuce stalks after checking them well for worms. Even if one feels that he is able to inspect the lettuce leaves for worms should know that in truth, it is almost impossible to check these leaves, for even after repeated checking, if one places the lettuce leaves on a piece of paper in the sun, after a few minutes he will be able to notice tens of worms crawling out of the leaves and onto the paper. Therefore, such an inspection should not be relied upon even in a place where no specially-grown lettuce is available. This has been the custom of Maran zt”l for many years, dating back to when there was no specially-grown lettuce, that only the white stalks of the lettuce should be eaten after a thorough inspection for worms. It is proper to make sure that the stalks of lettuce that are used for Maror come only from the part that was above ground, for there are those that maintain that one does not fulfill his obligation of eating Maror with the part of the spine which was underground during growth.
One should set his table beautifully on Erev Pesach and partake joyously of the holiday feast. Nevertheless, one should take care not to fill himself up too much with different delicacies so that he will able to partake of the Afikoman later on with appetite, and not that he should be so stuffed that eating it will be a burden, in which case one has not fulfilled the obligation of eating the Afikoman. Therefore, it is also important for the women in charge of preparing the festive meal for the Seder night to go easy on the preparation of heavy and numerous foods so that the members of the household do not come to a point where they will not fulfill their obligation of eating the Afikoman. The bulk of the culinary delights should be left for the Pesach-day meal.
After eating the festive meal, the “Afikoman” (which is the Matzah kept under the tablecloth; if this is not enough, another Matzah should be added) is eaten. This is a Kezayit (approx. 27 grams) of Matzah which is in commemoration of the Korban Pesach (Pesach offering) which was eaten with appetite. Some are stringent and customarily eat two Kezayits (approx. 54 grams) of Matzah, one to commemorate the Korban Pesach and one to commemorate the Matzah that was eaten along with it. However, halachically speaking, one Kezayit is sufficient.
One must be certain to eat the Afikoman with appetite and while leaning (without reciting a blessing on it). If one was so satisfied that he is repulsed by eating anymore, he has not fulfilled his obligation of eating the Afikoman, for excessive eating is not considered eating at all. Thus, one must pay attention to this fact during the meal, as we have mentioned. Similarly, one must make sure to eat the Afikoman while leaning, for if one did not, he must once again eat the Afikoman and this may lead to a point of excessive eating.