Passover is one of Judaism’s most beloved holidays — but it can also be one of the most expensive. Passover requires a menu that avoids all hametz (leavened products) and often necessitates the purchase of many new foods that are certified kosher and free of hametz. Jews also attend one or two seders — elaborate festive meals with multiple courses. Complying with Passover rules of kashrut alone can present a financial burden, as many Jews find themselves in need of purchasing one or two extra sets of dishes or cooking utensils, or otherwise using expensive disposables. And food...