We doubt many folks would drool over any menu description that mentions corn smut, because it sounds like something gnarly that Bizarre Foods host Andrew Zimmern would seek out on his Travel Channel show. But call this fungus by its Nahuatl name, as they do in Mexico, and it has quite an appetizing ring to it: huitlacoche. This is the magic ingredient in Sierra Bonita Grill's scrumptious mini-quesadillas, with menonita cheese, spinach, and huitlacoche wrapped in fragrant corn tortillas. Pico de gallo and black bean and hominy relish make tasty embellishments, but we prefer them plain — the better to savor the mushroom-y taste of these "Mexican truffles."