Creating a delicious Chicken Cordon Bleu Casserole can be straightforward if you follow these simple steps:

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

2. Dice Chicken: Begin by dicing the chicken breasts into bite-sized pieces.

3. Sauté Chicken: In a large skillet, heat olive oil over medium heat. Add the diced chicken and cook until no longer pink. This should take about 5-7 minutes. Season with salt, black pepper, garlic powder, and onion powder.

4. Layer the Casserole: In a greased 9×13 inch baking dish, layer the cooked chicken evenly at the bottom. Then layer the sliced ham on top.

5. Add Cheese: Sprinkle half of the shredded Swiss cheese over the ham layer.

6. Prepare Cream Mixture: In a mixing bowl, combine heavy cream, chicken broth, and Dijon mustard. Stir until well blended.

7. Pour Mixture: Pour the cream mixture evenly over the casserole layers.

8. Top with Breadcrumbs: Sprinkle the remaining Swiss cheese over the top, then finish with the breadcrumbs for a crunchy texture.

9. Bake: Place the casserole in the preheated oven and bake for 35-40 minutes or until the top is golden brown and bubbly.

10. Garnish: Remove from the oven and let it cool for a few minutes. Top with fresh parsley for a pop of color.

Following these easy steps will ensure your Chicken Cordon Bleu Casserole turns out rich, creamy, and incredibly flavorful.