Rinse and remove any unwanted parts to your chicken breasts or thighs. Then cut them into about 1 inch pieces.
Add the chicken, uncooked noodles, Alfredo sauce (plus a little water to rinse the jar out), broth, seasonings, parmesan cheese, and garlic to the cast iron skillet. Give everything a stir until combined and cover with foil.
Bake the dish at 425 degrees F for 35 minutes.
Carefully remove from oven, uncover, and give everything a stir.
Add mozzarella cheese. Place back in the oven for about 10 more minutes until cheese is melted and bubbly.