On Passover, Jews are commanded to retell the story of the Exodus, but the book they use to do it seems just as focused on food and drink as it is on the story itself. Why?

Not packaged, not square, not oven-baked: that’s what it wasn’t. But what it was and where the name for it comes from is still something of a mystery.

What the story of General Mills’ newly gluten-free cereal tells us about the food we eat—and don’t—at Passover.