Soften the Chilies
Soak dried chilies in hot water for 10 minutes until softened.
Make the Sauce
In a blender, combine softened chilies, garlic, crushed tomatoes, cumin, oregano, smoked paprika, salt, pepper, and 1 cup beef broth.
Blend until completely smooth.
Sear the Beef
Heat olive oil in a large Dutch oven over medium-high heat.
Sear beef chunks on all sides until browned.
Simmer
Pour blended sauce over beef.
Add remaining beef broth.
Bring to a gentle boil, then reduce heat.
Cover and simmer 2–2½ hours until beef is fork-tender.
(Pressure cooker option: 45–50 minutes.)
Shred the Beef
Remove beef and shred with two forks.
Strain broth if desired for smoother consomé.
Return shredded beef to some broth to keep moist.
Assemble the Tacos
Heat skillet over medium.
Dip tortilla into top layer of red broth.
Place in skillet and add shredded beef and cheese to one half.
Fold and cook 2–3 minutes per side until crispy.
Repeat with remaining tortillas.
Serve
Garnish with diced onion and cilantro.
Serve with warm consomé for dipping and lime wedges.