Start by boiling pasta water and cooking pasta according to package instructions. Drain and place in a baking dish.
Chop chicken into medium size chunks. And place in the dish with the pasta. Pour in Parmesan cheese, tomato sauce and water. Mix to combine.
Top with chunks of mozzarella and extra parmesan. Bake at 375 for 25 minutes. Broil at the end for 2-3 minutes or until mozzarella gets nice and brown. Garnish with basil and serve!