01 -
Preheat the oven to 350°F (175°C). Grease a 9x13 inch baking dish with butter or non-stick spray.
02 -
In a large mixing bowl, combine shredded cooked chicken, chopped ham, and shredded Swiss cheese until evenly distributed.
03 -
Whisk together cream of chicken soup, whole milk, Dijon mustard, garlic powder, onion powder, and ground black pepper in a separate bowl until smooth and well blended.
04 -
Pour the sauce over the chicken, ham, and cheese mixture, stirring until thoroughly coated. Spread the mixture evenly in the prepared baking dish.
05 -
In a small bowl, toss breadcrumbs with melted butter until crumbs are evenly moistened.
06 -
Evenly sprinkle the buttered breadcrumbs over the casserole. Bake in the oven for 30 to 35 minutes, until the top is golden and the dish is bubbling.
07 -
Remove from oven and let rest for several minutes. Garnish with fresh chopped parsley before serving.