In a large mixing bowl, combine softened cream cheese, heavy cream, and sour cream. Beat until smooth and well combined. Stir in garlic powder, onion powder, dried Italian herbs, salt, and black pepper. Adjust seasonings as needed and add broth if the sauce is too thick.
Add the shredded chicken and prepared low carb vegetables to the creamy sauce. Gently fold everything together until evenly coated. If desired, fold in extra shredded cheese.
Spoon the mixture into the prepared baking dish and sprinkle a generous layer of shredded cheese on top.
Bake for 25-30 minutes, or until bubbling and the cheese is melted and golden brown.
Let the casserole rest for 5-10 minutes before serving to allow the sauce to set.
Notes
Using pre-cooked rotisserie chicken can be a fantastic shortcut! Feel free to experiment with different vegetables.