Warm the skillet: Heat a large oven-safe skillet over medium heat.
Add oil and let it shimmer.
Sauté the aromatics: Add onion and peppers with a pinch of salt. Cook 5 to 7 minutes, stirring, until soft and lightly browned. Add garlic and cook 30 seconds until fragrant.
Season the base: Sprinkle in 1 teaspoon chili powder, 1 teaspoon cumin, 1/2 teaspoon smoked paprika, and a few grinds of pepper.
Stir to coat the veggies and toast the spices for 30 seconds.
Add the chicken: Stir in the cooked chicken and green chiles. Warm for 1 to 2 minutes so everything mingles.
Pour in sauce: Add the enchilada sauce. If it seems too thick, splash in 1/4 cup broth.
If you want a creamy finish, stir in the cream cheese until melted and smooth.
Simmer: Reduce heat and let it bubble gently for 3 to 5 minutes. Taste and add salt if needed.
Cheese time: Sprinkle the shredded cheese evenly over the skillet. If your skillet is oven-safe, transfer to the broiler for 1 to 2 minutes to melt and brown the top.
If not, cover with a lid and melt the cheese on the stovetop.
Finish and garnish: Remove from heat. Scatter chopped cilantro over the top. Serve with lime wedges and your favorite keto-friendly toppings.