01 - Preheat oven to 375°F. Lightly grease a medium casserole dish with cooking spray or a small amount of oil.
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 thoroughly until all ingredients are well distributed.
03 - Spread the chicken mixture evenly across the bottom of the prepared casserole dish, pressing gently to create a uniform layer.
04 - Pour the sugar-free marinara sauce over the chicken layer. Use the back of a spoon to spread gently, covering the chicken mixture completely.
05 - Sprinkle the remaining mozzarella and Parmesan cheeses evenly over the sauce layer, ensuring complete coverage.
06 - If using, scatter crushed pork rinds over the cheese layer for added texture and crunch.
07 - Bake for 25 to 30 minutes, or until the casserole is bubbling around the edges and the cheese has developed a golden-brown crust.
08 - Remove from oven and let rest for 5 minutes. Garnish with chopped fresh basil and serve hot.