
Heat the olive oil over medium heat in an oven-safe pan or skillet. Add the diced onions and bell pepper, and saute until soft and translucent, about 5 minutes.
Add the shredded chicken, 2 ½ cups enchilada sauce, and taco seasoning. Stir and simmer for about 5 minutes to combine the flavors.
Gently fold in the tortilla strips until fully combined. Continue cooking for an additional 5 minutes to allow the tortilla strips to soften and soak up flavor.
Top with the remaining ½ cup enchilada sauce, the shredded cheese, and broil for 5 minutes until the cheese is fully melted and bubbly.
Top with chopped cilantro and serve immediately with sour cream or guacamole.