Preheat your oven to 375°F (190°C). Lightly grease a 9x13 inch baking dish.
In a large skillet over medium-high heat, cook the chicken until browned and cooked through. Drain any excess liquid.
1.5 lbs boneless, skinless chicken breasts
Add the sliced onions and bell peppers to the skillet with the chicken. Cook until tender, about 5-7 minutes.
1 large onion, 2 bell peppers
Stir in the drained corn, black beans, diced tomatoes and green chiles (Rotel), and fajita seasoning. Mix well.
1 (15 ounce) can corn, 1 (15 ounce) can black beans, 1 (10 ounce) can diced tomatoes and green chiles (like Rotel), 1 packet fajita seasoning
Pour the chicken and vegetable mixture into the prepared baking dish.
Top evenly with the shredded Mexican cheese blend.
2 cups shredded Mexican cheese blend
Bake in the preheated oven for 20-25 minutes, or until the cheese is melted and bubbly.
Let cool for a few minutes before serving. Top with sour cream, guacamole, salsa, and cilantro, if desired. Enjoy your delicious and easy Chicken Fajita Casserole!
Sour cream, Guacamole, Salsa, Cilantro
