Preheat the oven to 350 degrees. Prepare two 9x13 baking dishes with nonstick cooking spray.
In a large mixing bowl, beat together the cream cheese, mayonnaise, and seasonings until well blended.
To the mixing bowl, add the bell pepper, artichoke hearts, chicken, and parmesan cheese.
Transfer the mixture to the prepared baking dishes.
Top the casserole with mozzarella cheese.
Bake for 40 to 45 minutes or until the chicken is cooked through.
Allow the casserole to rest for 5 minutes before slicing and serving.