Melt the butter in a skillet over medium heat.

Add in the onions and mushrooms, and saute until they have softened.

Mix in the garlic, and saute for 30 seconds longer.

Pour in the heavy whipping cream, and simmer until thickened.

Stir in ¼ cup of the grated parmesan, and salt and pepper to taste.

Combine the palmini noodles, parsley and tuna in a large bowl, and pour the sauce mixture over it. Stir to combine well.

Preheat the oven to 350 degrees.

Add the mixture to a well greased baking dish.

Stir together the remaining parmesan and pork rind crumbs in a bowl.

Sprinkle the pork rind crumb mixture over the casserole.

Bake for 20 minutes, or until browned on top and cooked through.

Let cool for 10 minutes before serving.