Cook the tortellini for two minutes less than time given on package. Drain and place in a large bowl.
Carefully stir in chicken cubes, spinach, tomatoes, and alfredo sauce until combined.
Place mixture in a greased 9x13 baking dish. Sprinkle cheese over pasta to cover.
Bake at 350° for 10-15 minutes, or until cheese is melted. Enjoy!