01 -
Set oven to 350°F (175°C) and coat a 9×13-inch baking dish thoroughly with cooking spray.
02 -
In a large bowl, mix chopped chicken breast, diced ham, and 1 cup of the Swiss cheese. Evenly distribute mixture into the prepared baking dish.
03 -
In a separate bowl, whisk together cream of chicken soup, milk, Dijon mustard, garlic powder, thyme, salt, cracked black pepper, and 1/4 teaspoon paprika until smooth.
04 -
Pour the prepared sauce evenly over the chicken and ham mixture. Sprinkle the remaining Swiss cheese on top.
05 -
In a small bowl, combine melted butter, Panko bread crumbs, and remaining 1/4 teaspoon paprika. Evenly scatter over the casserole.
06 -
Transfer casserole, uncovered, to the oven. Bake for 25–30 minutes or until the topping is golden and the casserole is bubbly.
07 -
Allow casserole to rest for several minutes before portioning and serving.