We count five Southern food groups, not just four, because we think Tex-Mex deserves the recognition. To sample it in Oklahoma City, order the grilled fajitas at Ted's Café Escondido. The fresh salsa at Jalisco Mexican Restaurant keeps 'em coming back in Atlanta. But let's be serious: Only the Lone Star State has mastered the art of Tex-Mex. Follow locals in El Paso to eat at H & H Car Wash--not only to get your car cleaned, but also to enjoy the freshly made chiles rellenos and salsa.