01 - Preheat oven to 375°F and lightly grease a medium casserole dish with cooking spray or butter.
02 - In a large bowl, combine cooked chicken, softened cream cheese, half the mozzarella, half the Parmesan, Italian herbs, garlic powder, salt, and black pepper. Mix until thoroughly incorporated.
03 - Spread the chicken mixture evenly across the bottom of the prepared casserole dish, pressing lightly to create a uniform layer.
04 - Pour the sugar-free marinara sauce over the chicken layer, spreading gently with a spatula to cover the entire surface.
05 - Sprinkle the remaining mozzarella and Parmesan cheeses evenly over the sauce layer.
06 - If using, scatter crushed pork rinds over the cheese layer for added texture and crunch.
07 - Bake for 25 to 30 minutes until the casserole is bubbling around the edges and the cheese has developed a golden-brown crust.
08 - Remove from oven and let cool for 5 minutes to set. Garnish with chopped fresh basil and serve hot.