Creating Chicken Cordon Bleu Casserole is easy when you follow these straightforward steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C).
2. Prepare the Baking Dish: Grease a 9×13 inch baking dish with cooking spray or butter.
3. Combine Chicken and Ham: In a large mixing bowl, combine the shredded chicken and diced ham. Mix well.
4. Add Cheese: Add 1 ½ cups of the swiss cheese to the chicken and ham mixture, and stir until evenly distributed.
5. Create the Sauce: In a separate bowl, whisk together the chicken broth, heavy cream, garlic powder, onion powder, thyme, Dijon mustard, salt, and pepper.
6. Combine Everything: Pour the sauce over the chicken and ham mixture. Gently fold to combine until everything is lightly coated.
7. Transfer to Baking Dish: Pour the mixture into the prepared baking dish, spreading it evenly.
8. Top with Breadcrumbs: Sprinkle the remaining swiss cheese over the top, followed by the breadcrumbs.
9. Bake: Place the dish in the preheated oven and bake for 30-35 minutes, or until the top is golden brown and bubbly.
10. Cool: Once out of the oven, let it cool for about 10-15 minutes.
11. Garnish: Sprinkle with fresh parsley before serving for a pop of color and freshness.

These steps will guide you through making this incredible casserole with ease.