
Stem and seed the chiles, cover with hot water, and soak 10 minutes until soft.
Blend the drained chiles, tomatoes, half the onion, garlic, cumin, oregano, salt, and 1 cup broth until smooth.
Cut the beef into large chunks, put it in the slow cooker, and pour in the sauce and remaining broth. Cover and cook on LOW for 8 hours.
Shred the beef and skim the red fat from the top of the broth into a small bowl.
Dip each tortilla in the fat, lay it on a hot skillet, add cheese and beef, fold, and cook 2 minutes per side until crisp.
Serve with cups of the hot broth for dipping, topped with the rest of the onion (chopped) and cilantro.
Photo: DinnerDrop