The little-known “Stadium Nacho,” which is a refined blend of cheddar and Romano cheeses, with an insouciant hint of brand marketing for Madden NFL. (photo: Paxton Holley)Those of us who grew up with orange-tinted fingers and salt-cured lips from spending too much time feeding at the Dorito trough know what “nacho” cheese is, or at least we know what it tastes like.