1. Toast the dried chiles in a dry skillet over medium heat until fragrant, about 2 minutes. Be careful not to burn them.
2. Place the toasted chiles in a bowl and cover with hot water. Let them soak for 20 minutes until softened.
3. Drain the chiles and place them in a blender along with the onion, garlic, cumin, and oregano. Blend until smooth, adding a bit of beef broth if needed to help blend.
4. In a large pot, brown the beef cubes over medium-high heat. Work in batches if necessary to avoid overcrowding the pot.
5. Once the beef is browned, return all the beef to the pot. Add the chile sauce and beef broth. Stir to combine.
6. Bring the mixture to a boil, then reduce the heat to low. Cover and simmer for about 2 hours, or until the beef is tender.
7. Season with salt and pepper to taste. Serve hot.
Notes:
This stew is perfect for a cozy dinner. Serve with warm tortillas or over rice.