01 -
Preheat the oven to 350°F. Lightly coat a 9×13-inch baking dish with cooking spray and set aside.
02 -
Shred the cooked chicken breasts and place them in a large mixing bowl; set aside.
03 -
Heat olive oil over medium-high heat in a skillet. Add the green and red bell pepper strips and sliced onion. Season with ¼ teaspoon salt. Sauté for 4 to 5 minutes, stirring frequently, until vegetables are tender but still crisp.
04 -
Remove skillet from heat. Transfer sautéed vegetables to the bowl containing shredded chicken and toss gently; set aside.
05 -
In a separate large bowl, combine softened cream cheese, half of the shredded cheddar cheese, fajita seasoning mix, salt, and freshly ground black pepper. Mix thoroughly until smooth and well blended.
06 -
Add the cream cheese mixture to the chicken and peppers bowl. Stir until all components are evenly combined.
07 -
Transfer the combined mixture into the prepared baking dish. Evenly sprinkle the remaining shredded cheddar cheese over the top.
08 -
Place the baking dish in the preheated oven and bake for 25 to 30 minutes, or until the casserole is hot throughout and cheese is melted and bubbly.
09 -
Remove from oven and garnish with freshly chopped cilantro or parsley before serving.