Chicken Cordon Bleu Casserole--Tasty Kitchen

• Click HERE for the original recipe, and see below for my adaptations.
• 
  
• FOR THE CASSEROLE:
• 1 whole cooked chicken, Bones Removed, Meat Diced Or Shredded (rotisserie Chicken Is Excellent, Should Be 5-6 Cups Of Chicken)
• ½ pounds Very Thinly Sliced Deli-style Honey Ham (or left over ham)
• ¼ pounds Thin Sliced Baby Swiss Cheese
• 
  
• FOR THE SAUCE:
• 6 Tablespoons Butter
• 6 Tablespoons Flour
• 5 cups Milk (I have used skim, evaporated, and coconut milk--all have worked great)
• 3 Tablespoons Fresh Squeezed Lemon Juice
• 2 Tablespoon Dijon Mustard (I actually used honey mustard, which was also great)
• 
  
• FOR THE TOPPING:
• 6 Tablespoons Butter
• 1-½ cup Panko Bread Crumbs
• ¾ teaspoons Seasoning Salt

Preheat oven to 350 F. Butter a 9- x 13-inch baking dish. Set aside.

Put cooked shredded or diced chicken on the bottom of the baking dish. Rough chop the ham and scatter it over the top of the chicken. Lay the Swiss cheese on top of the ham.

For the sauce:

Melt the butter in a large sauce pot over medium heat. When butter is melted, quickly stir in the flour to form a smooth roux. Do not brown! Once the roux is smooth and bubbly, slowly pour in the cold milk while stirring briskly to make a smooth sauce. Cook over medium heat, stirring constantly until the sauce thickens. Stir in the lemon juice and Dijon/honey mustard. Bring sauce just back to a low boil and turn off heat. Pour sauce evenly over the casserole, being certain to get some of the sauce around the edges of the pan.

For the topping:

Melt the butter in the microwave in a medium sized microwaveable bowl. Heat it for 30 seconds at a time and stop once it’s melted. Take the bowl out of the microwave and stir in the panko bread crumbs, and seasoning salt. Sprinkle over the top of the casserole.

Bake casserole uncovered for 45 minutes until hot and bubbly throughout and topping has turned a light golden brown. Remove from oven and allow to cool for 5-10 minutes prior to serving.