Chicken Cordon Bleu Casserole

I like the taste of Chicken Cordon Bleu but it's pretty time consuming to make. This casserole is easy and tastes just like the real thing. Plus, this would make a great freezer meal or meal to take to someone who's ill or just had a baby.

Chicken Cordon Bleu Casserole
Adapted from Tasty Kitchen

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, Rough Chopped
¼ pounds Thin Sliced Baby Swiss Cheese
FOR THE SAUCE:
4 Tablespoons Butter
4 Tablespoons Flour
3-¼ cups Milk (I Used Whole Milk)
2 Tablespoons Fresh Squeezed Lemon Juice
1 Tablespoon Dijon Mustard
1-½ teaspoon Salt
½ teaspoons Smoked Paprika
¼ teaspoons White Pepper

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, Dijon mustard, salt, smoked paprika and white pepper. 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.

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