Have you ever gotten to the end of, say, a jar of peanut butter and wondered if it should go in trash or recycling? If it’s worth rinsing out? And where will it actually end up? Journalist Alexander ...

It's already grated for you. And, though it's got some haters, pre-grated Parm also has tons of fans, many of whom remember it from childhood as the garnish for spaghetti and meatballs.