Warm the skillet: Heat a large nonstick or cast-iron skillet over medium.
If your beef is very lean, add the olive oil.
Brown the beef: Add the ground beef and break it up. Cook until no longer pink, about 5–6 minutes. Drain any excess fat if needed.
Sauté the aromatics: Add onion and bell pepper.
Cook until softened, 3–4 minutes. Stir in garlic and cook 30 seconds, until fragrant.
Season it up: Sprinkle in cumin, chili powder, smoked paprika, oregano, salt, and pepper. Stir to coat the meat and veggies.
Add beans and corn: Mix in black beans and corn.
Cook 1–2 minutes to warm through.
Pour in sauce and broth: Add the enchilada sauce and broth. Stir and bring to a gentle simmer.
Stir in tortilla strips: Fold in the corn tortilla strips. Simmer 3–5 minutes, stirring occasionally, until the tortillas soften and slightly thicken the mixture.
Melt the cheese: Reduce heat to low.
Sprinkle cheese evenly over the skillet. Cover for 2–3 minutes, until the cheese is melted and gooey.
Finish and season: Squeeze in the lime juice. Taste and adjust salt, pepper, or chili powder as needed.
Serve: Top with cilantro and your favorite toppings.
Spoon into bowls and enjoy hot.