Creating this amazing Chicken Cordon Bleu Casserole is straightforward if you follow these simple steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) and grease a 9×13 inch baking dish.
2. Combine Cream Sauce: In a medium bowl, whisk together the heavy cream, chicken broth, Dijon mustard, garlic powder, onion powder, salt, and black pepper until well combined.
3. Layer Ingredients: Place half of the cooked chicken in the greased baking dish, followed by half the diced ham and half the shredded Swiss cheese.
4. Add Sauce: Pour half of the cream mixture over the first layer, ensuring even distribution.
5. Repeat Layers: Add the remaining chicken, ham, and cheese in another layer. Pour the remaining cream sauce over the top.
6. Sprinkle Breadcrumbs: In a small bowl, mix the breadcrumbs with olive oil until well combined. Sprinkle the breadcrumb mixture over the top of the casserole.
7. Bake: Place the dish in the preheated oven and bake for 40-45 minutes, or until the casserole is bubbly and the top is golden brown.
8. Cool: Remove from the oven and allow it to sit for 5-10 minutes before serving to let it set.
9. Garnish: Top with freshly chopped parsley before serving for a pop of color and flavor.

These simple instructions will help you create a mouthwatering Chicken Cordon Bleu Casserole that your family and friends will rave about.