Preheat oven to 375°F.
In a large 9x13 baking dish, dump in Alfredo sauce, pesto, cut up chicken sausage and chicken broth. Stir, and pour in uncooked pasta. Stir until pasta is coated and liquid is evenly distributed.
Mix in 1 cup mozzarella, season with salt and pepper
Sprinkle the remaining mozzarella on top along with Parmesan cheese
Cover tightly with foil and bake for 35 minutes. Remove foil and bake uncovered for another 10–15 minutes, until pasta is tender and top is golden bubbly. You can broil the last few minutes.
Let sit 5 minutes before serving.
