Step 1

Preheat the oven to 350 degrees and spray a 9×13 casserole dish with nonstick spray.

Step 2

Layer the chicken in the bottom of the dish followed by the ham and finally the swiss cheese.

Step 3

Melt the butter over medium heat, in a medium saucepan, and add garlic as it melts. Keep stirring with a rubber spatula to avoid burning.

Step 4

Stir in salt, pepper, Dijon mustard, smoked paprika and lemon juice.

Step 5

Whisk in the flour and cook for 1 minute.

Step 6

Add the milk, slowly. Whisk often to keep clumps from forming. Turn the heat to high and cook until the sauce thickens and boils completely.

Step 7

Pour the finished sauce over the base layer already in the dish.

Step 8

Mix the topping ingredients, in a small bowl, until the butter is evenly distributed over the crumbs.

Step 9

Sprinkle over the top of the dish and bake for 45 minutes at 350 degrees. Allow to cool for 10 minutes before serving so the sauce thickens just a bit.