Preheat oven to 375℉.
In a mixing bowl, combine the cream cheese and pesto. You can microwave the mixture in 10-second intervals if the cream cheese needs to be softened a bit.
Prepare your baking dish with non-stick spray.
Place chicken breasts in baking dish.
Cover each piece of chicken evenly with the cream cheese pesto mixture.
Add shredded mozzarella evenly over each piece of chicken.
Cover the dish with foil.
Bake at 375 for 45 minutes or until your chicken is fully cooked (some chicken breast pieces are larger than others, so bake accordingly).
Uncover and broil for 2 minutes to achieve the golden color on top.