When I think about what I love so much about being Jewish, the answer always comes back to rituals and traditions. My favorite holiday, Passover, which millions of Jews will begin observing on Friday, is arguably the most ritual – laden of them all. The centerpiece of the holiday is the meal known as the seder, a word that literally means order. We eat certain foods, recite specific blessings and follow a routine laid out by a book called a “haggadah.”