Creating your Chicken Cordon Bleu Casserole is simple! Follow these straightforward steps for a delicious result:

1. Preheat Oven: Begin by preheating your oven to 350°F (175°C).
2. Prepare Baking Dish: Grease a 9×13 inch casserole dish with olive oil or non-stick spray.
3. Combine Ingredients: In a large bowl, mix together the shredded chicken, diced ham, and half of the Swiss cheese.
4. Make the Sauce: In a separate bowl, combine the sour cream, chicken broth, Dijon mustard, garlic powder, onion powder, thyme, salt, and pepper. Stir well.
5. Mix Everything: Pour the sauce over the chicken and ham mixture. Stir until everything is evenly coated.
6. Transfer to Dish: Pour the mixture into the prepared baking dish and spread it out evenly.
7. Top with Cheese and Breadcrumbs: Sprinkle the remaining Swiss cheese and then the breadcrumbs evenly over the top.
8. Bake: Place the casserole in the preheated oven and bake for 30-35 minutes, or until the top is golden brown and bubbling.
9. Cool Slightly: Once baked, let it cool for about 5-10 minutes before serving.

With these steps, your Chicken Cordon Bleu Casserole will come together beautifully!