Start by toasting the dried chilis in a dry skillet over medium heat until they become fragrant, about 2-3 minutes. Be careful not to burn them.
Place the toasted chilis in a bowl and pour hot water over them, allowing them to soak for approximately 15 minutes until they become soft and pliable.
In a blender, combine the soaked chiles, onion, garlic, apple cider vinegar, cumin, oregano, thyme, paprika, and a pinch of salt and pepper. Blend until smooth, adding some of the soaking water if needed to achieve a smooth consistency.
In a large pot or Dutch oven, warm a small amount of oil over medium-high heat. Season the beef with salt and pepper, then sear it on all sides until browned.
Pour the chile sauce over the beef, add the beef broth, and bring to a boil. Reduce the heat to low, cover, and simmer for about 3-4 hours, or until the meat is tender and easily shredded