Chicken Cordon Bleu Tetrazzini

IngredientQuantity
Cooked chicken, chopped2 cups
Ham, chopped1 1/2 cups
Spaghetti, cooked1 pound
Swiss cheese, grated3/4 cup
Kosher salt and black pepperTo taste

For the Topping:

IngredientQuantity
Panko breadcrumbs1 cup
Parmesan cheese, grated1/2 cup
Unsalted butter, melted1/4 cup

Instructions: