Creating your Doritos Casserole with Chicken is straightforward if you follow these steps carefully:

1. Preheat Oven: Start by preheating your oven to 350°F (175°C) to ensure it’s ready for your casserole.

2. Prepare the Baking Dish: Lightly grease a 9×13-inch baking dish using cooking spray or oil to prevent sticking.

3. Mix the Chicken and Ingredients: In a large bowl, combine shredded chicken, cream of chicken soup, sour cream, diced tomatoes, taco seasoning, onions, and bell peppers (if using). Mix until well combined.

4. Add Cheese: Gently fold in one cup of shredded cheese into the mixture for added creaminess and flavor.

5. Layer the Doritos: Spread half of the crushed Doritos evenly on the bottom of the greased baking dish.

6. Add the Chicken Mixture: Pour the chicken mixture over the Doritos, ensuring even coverage.

7. Top with Doritos: Sprinkle the remaining crushed Doritos on top of the chicken mixture for a satisfying crunch.

8. Bake the Casserole: Place the baking dish in the preheated oven and bake for 30-35 minutes, or until heated through and bubbly.

9. Melt Additional Cheese: In the last few minutes of baking, sprinkle the remaining cheese over the top and allow it to melt.

10. Cool and Serve: After baking, let the casserole cool for a few minutes before serving. This helps the layers set and makes it easier to dish out.

These steps will guide you in preparing an incredible Doritos Casserole with Chicken that is sure to be a hit!