Chilis de la Sierra

Chiles de la Sierra is a traditional dish originating from Sierra de Puebla. It's usually made with a combination of ancho chili peppers, onions, vinegar, salt, oil, oregano, and queso añejo. The chili peppers are heated in order to soften, then flattened and fried. The sliced onions are cooked until translucent, then mixed with the vinegar, salt, water, and chili peppers. The combination is cooked until the chili peppers become soft. Each chili pepper is sprinkled with cheese on the inside, and they are then layered in a serving dish and topped with the remaining pan liquid, sprinkled with oregano, and garnished with cooked and raw onion rings. The dish is left to marinate in the fridge, and it's then garnished with lettuce and tomatoes before being served as an appetizer or an accompaniment to grilled meat.