Creating Chicken Cordon Bleu Casserole is straightforward with these easy steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C).

2. Prepare the Pasta: Cook the pasta according to package instructions until al dente. Drain and set aside.

3. Mix the Chicken and Ham: In a large mixing bowl, combine the cooked chicken and chopped ham.

4. Add Cheese: Stir in half of the shredded Swiss cheese, mixing well with the chicken and ham.

5. Prepare the Sauce: In another bowl, whisk together the cream of chicken soup, sour cream, garlic powder, onion powder, Dijon mustard, salt, and pepper. Ensure the mixture is smooth.

6. Combine Ingredients: Add the cooked pasta and sauce to the chicken and ham mixture. If using, fold in the frozen peas and mix thoroughly until everything is coated.

7. Transfer to Casserole Dish: Pour the mixture into a greased 9×13-inch casserole dish, spreading it evenly.

8. Top with Cheese: Sprinkle the remaining Swiss cheese over the top of the casserole.

9. Prepare Breadcrumb Topping: In a small bowl, mix the breadcrumbs with melted butter until well-coated. Sprinkle the breadcrumb mixture evenly over the cheese.

10. Bake: Place the casserole in the preheated oven and bake for 30-35 minutes or until bubbly and the top is golden brown.

11. Cool Before Serving: Remove from the oven and let it sit for 10-15 minutes before serving to allow the flavors to meld.

Enjoy the anticipation as you prepare it—it’ll be worth the wait!