Silver Skillet (Atlanta, Ga.) • Magnolia Pancake Haus (San Antonio, Tex.) • Perk Eatery (Scottsdale, Ariz.)This trip Guy's headin' back to some of his favorite diners. In Atlanta, a joint servin' up Southern comfort with country ham 'n red-eye gravy and a mighty mac and cheese. In San Antonio, a staple dishin' out brisket hash. And in Arizona, a joint platin' up a supreme breakfast burrito.