This Chicken Fajita Casserole is a delicious, one-pan meal packed with tender chicken, bell peppers, onions, and a flavorful blend of spices. Topped with cheese, it’s a satisfying dish perfect for family dinners or meal prep.
Preheat your oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish.
Prepare the Vegetables:
Heat olive oil in a large skillet over medium heat. Sauté the sliced onions and bell peppers until softened (about 5 minutes). Add the fajita seasoning and cook for another 1-2 minutes until fragrant. Remove from heat.
Assemble the Casserole:
In the prepared baking dish, layer the cooked chicken, sautéed veggies, rice (if using), and diced tomatoes. Spread sour cream over the top, then sprinkle with shredded cheddar and mozzarella cheeses.
Bake:
Bake for 20–25 minutes, or until the cheese is melted and bubbly. Let it rest for 5 minutes before serving.
Notes
Make Ahead: This casserole can be assembled ahead of time and refrigerated for up to 1 day before baking. You can also freeze it for up to 3 months. Thaw overnight in the fridge before baking.Customizing the Flavor: For a spicier kick, add sliced jalapeños to the vegetable mixture or sprinkle chili flakes on top before baking.Serving Suggestions: Serve with a side of guacamole, salsa, or a fresh green salad for a complete meal.Allergy-Friendly Options: To make this casserole gluten-free, ensure your fajita seasoning and rice are gluten-free. You can also substitute the sour cream with a dairy-free alternative.