Regardless of whether or not you go for the full Pesach Monty, complete with new dishes and kosher-for-Passover condiments, committing to eight days sans chametz (Hebrew for leavened foods that are forbidden during Passover) will be a challenge, thanks to the ubiquity of the five grains — wheat, barley, spelt, rye and oats — we must omit from our diets for the duration of the holiday....