Preheat oven to 400ºF
Cut zucchini in half and scoop out the center of each half to create boats. Place zucchini boats in a casserole dish.
Add the cooked chicken, Alfredo sauce and half of the mozzarella, stir and spoon into the center. Top with the remaining mozzarella cheese.
Bake for 20-25 minutes or until zucchini is fork-tender. Sprinkle with Italian seasoning and parmesan cheese if desired.
