Puntas de Filet ArrieroGuanajuato, a colonial city in the state of the same name in central Mexico, is known for its Festival International Cervantino in October, in honor of the author, Miguel Cervantes. The city comes alive with drama, music, dancing, and visitors from all over the world. Guanajuato is also the birthplace of Diego Rivera, one of Mexico's most famous artists.During a recent visit, my husband and I stayed at the historic Posada Santa Fe, a perfect location beside the leafy Jardin Union in the center of the city. The hotel's outdoor café borders the walkways of the plaza providing diners with a constant parade of sights.My husband and I relished the setting on a balmy late February evening where I also relished my entrée of arriero. My beautifully presented plate of bite-size strips of beef smothered in a bold onion sauce, fresh tomatillo salsa, a fan of sliced avocado, and strips of panela cheese, elevated this dish to a sophisticated level while keeping the traditional name and terrific flavor.The green tomatillo sauce can be prepared ahead. Maggi seasoning extract is available in supermarkets almost everywhere in the United States.