At Utah’s La Frontera restaurants, created by the Tovar family, rib-sticking Mexican fare and low prices are the main calling cards. For many, the family’s chile verde recipe is a national treasure. But equally appealing are the enchiladas, tacos, smothered burritos, chimichangas, tamales, tostadas or a dozen other items from the extensive menu. And you can always put the fire out with a cold cerveza. Kids especially like the easy-to-eat flautas.