Like most tales of great invention, the story of Plumpy’nut begins with a eureka moment, in this case involving a French doctor and a jar of Nutella, and proceeds through the stages of rejection, acceptance, evangelization and mass production. The product may not look like much — a little foil packet filled with a soft, sticky substance — but its advocates are prone to use the language of magic and wonders. What is Plumpy’nut? Sound it out, and you get the idea: it’s an edible paste made of peanuts, packed with calories and vitamins, that is specially formulated to renourish starving children.