Preheat oven to 350 degrees and grease a 13 x 9-inch casserole pan.
Set aside.
Combine shredded chicken breast, parmesan cheese, ricotta cheese, garlic powder, parsley, salt, and pepper in a medium bowl and stir.
Heat condensed soup in a saucepan over medium heat.
Add evaporated milk and whisk until smooth.
Add garlic herb cream cheese and whisk until melted and smooth.
Turn off heat add 1 cup shredded mozzarella cheese and stir.
Scoop chicken mixture into cooked pasta shells and top with the garlic herb cheese sauce.
Pour remaining sauce over shells and sprinkle with remaining 1/2 cup mozzarella cheese.
Bake for about 25 minutes, until cheese is melted and bubbly.
Enjoy!