Kale. Cupcakes. Sriracha. Bacon-wrapped . . . anything. Each passing year seems to bring with it a new culinary darling, an ingredient or dish that enjoys a moment in the limelight making its mark on restaurant menus, grocery store shelves, and, yes, in cookbooks.Quinoa is the latest heir to the food-trend throne, and with good reason: the protein-packed, gluten-free seed is a bona fide superfood. But while the nutritional attributes of quinoa are...