Preheat oven to 400. Spray a large casserole dish with cooking spray.
Combine the first three ingredients and mix until smooth in a large bowl. Add the chicken and cubed mozzarella. Transfer to the casserole dish. Sprinkle the shredded mozzarella on top.
Bake for 25-30 minutes. Serve with zoodles, spinach, or mashed cauliflower.
Notes
Nutrition: The nutrition facts are for ⅛th of the casserole. I just eye it up when cutting through the cheese. There are 2.8 NET carbs per serving.Sauce: use ¼ cup cream for a thick sauce and ½ cup for a thinner sauce