Stinging Nettles. What, you missed that day in Professor Slughorn‘s class? Though raw stinging nettles will indeed hurt you for a few minutes if you touch them with bare hands, you don’t need a magic wand or copy of Advanced Potion-Making to transform those-who-shall-not-be-handled into a terrific—and nutrient-dense—workhorse green. A couple-minute blanch is all it takes…