Warm the skillet: Heat oil in a large nonstick or cast-iron skillet over medium heat. Add onion and bell pepper.
Cook, stirring often, until softened and lightly browned, about 5–6 minutes.
Add garlic and spices: Stir in garlic, cumin, chili powder, and smoked paprika. Cook 30 seconds until fragrant. Season with a pinch of salt and pepper.
Build the base: Add black beans, corn, drained tomatoes, and enchilada sauce.
Stir to combine and bring to a gentle simmer.
Fold in chicken: Add shredded chicken and stir. Simmer 3–4 minutes so the flavors meld. Taste and adjust salt, pepper, or chili powder.
Add tortillas: Stir in tortilla strips.
Press them gently into the sauce so they soften slightly but don’t disappear. Cook 2–3 minutes until tender.
Cheese and finish: Sprinkle cheese evenly over the top. Cover the skillet (or tent with foil) and let the cheese melt, 1–2 minutes.
Remove from heat.
Garnish and serve: Top with cilantro. Serve with lime wedges and optional toppings like avocado or a dollop of Greek yogurt.