Heat the oven to 350 degrees, and grease a 9x13 baking dish well.
Layer the chicken and ham in the bottom of the baking dish.
Add the butter to a skillet over medium heat.
Saute the onions in the skillet until softened.
Stir in the garlic, and saute for 30 seconds longer.
Mix in the heavy whipping cream, dijon mustard and salt and pepper to taste.
Simmer until the sauce is thickened.
Stir in the shredded cheddar cheese until melted.
Pour the sauce over the meat in the casserole dish, and stir to combine.
In a bowl, mix together the pork rinds and Parmesan cheese.
Sprinkle the crumb mixture on top of the casserole.
Bake for 20 minutes.
Let sit for 5-10 minutes before serving.