01 -
Preheat oven to 350°F (175°C). Lightly grease a 9×13-inch (23×33 cm) baking dish with butter or nonstick spray.
02 -
Bring a large pot of salted water to a boil. Cook egg noodles until al dente, about 7–9 minutes. Drain well and arrange noodles evenly in the bottom of the prepared casserole dish.
03 -
Distribute the chopped cooked chicken over the noodles. Add the cubed ham and top evenly with Swiss cheese cubes.
04 -
In a medium bowl, whisk together the cream of chicken soup, 2% milk, and light sour cream until smooth. Spoon the mixture evenly over the layered chicken, ham, and cheese.
05 -
In a small saucepan over medium heat, melt the butter. Stir in seasoned breadcrumbs and grated Parmesan cheese until well combined. Sprinkle the breadcrumb mixture over the casserole.
06 -
Place the casserole in the oven and bake uncovered for 25–30 minutes, until the topping is golden and the filling is bubbling.
07 -
Remove from the oven and let the casserole rest for about 5 minutes to set before serving hot.