Prepare the Chiles: In a dry skillet, toast the guajillo and ancho chiles for a few minutes until fragrant. Soak them in hot water for about 10 minutes until softened.
3 dried guajillo chiles, 2 dried ancho chiles
Make the Marinade: In a blender, combine soaked chiles, onion, garlic, cumin, oregano, and beef broth. Blend until smooth.
1 onion, 4 cloves garlic, 2 cups beef broth, 1 teaspoon cumin, 1 teaspoon oregano
Cook the Beef: In a large pot, add the beef chunks and pour the marinade over the top. Season with salt and pepper. Bring to a boil, then reduce heat to low and simmer for about 2-3 hours, or until the beef is tender and easily shredded.
2 lbs beef chuck roast, Salt and pepper to taste
Prepare Tacos: Remove the beef from the pot and shred it. Heat corn tortillas on a skillet until warm. Fill each tortilla with shredded beef.
Corn tortillas
Serve: Garnish the tacos with chopped cilantro and diced onions. Serve with a side of consomé for dipping and lime wedges for squeezing over the top.
Chopped fresh cilantro for garnish, Diced onions for garnish, Lime wedges for serving