"The oversize corn-tortilla-ish disk, made from rose-colored heirloom corn and smeared with refried black beans, delivers a chewy crunch and serious depth of flavor. Its toppings of stretchy Oaxaca-style cheese called quesillo, mezcal-sautéed hen-of-the-woods mushrooms, white onion, salsa macha, and cilantro make it even more delicious."