Taquería Molcajetes (Santa Rosa, Calif.) • Ma Harper's Creole Kitchen (San Antonio, Tex.) • Dignowity Meats (San Antonio, Tex.)Guy Fieri's diving into dishes with righteous regional flavor. In California, he finds a real-deal Mexican spot dishing out Michoacan specialties. And in San Antonio, a pair of joints: one cookin' creole classics, and deli mashin' up East Coast and Texas flavors.