This trip, Guy Fieri's diggin' in diner style! First, an old-school Atlanta spot is still serving up savory Southern comfort with mighty mac 'n cheese and meatloaf with collard greens. Then, a San Antonio staple known for their killer breakfast is dishing out a real-deal brisket hash with salsa verde, and in Scottsdale, Ariz., a scratch-made eatery with a southwest kick is plating a supreme breakfast burrito.