Cook pasta according to directions, drain and set aside. Take off 1 or 2 minutes from the cooking time suggested.
Mix together Alfredo sauce, sour cream, Parmesan cheese, and pepper in a pot. Stir constantly while letting all that goodness heat up and melt together. Add shredded turkey.
Lay all the pasta in a 9 x 13 pan. Sprinkle mozzarella cheese on top of pasta and then pour Alfredo and turkey mixture on top of that. Sprinkle with more Parmesan cheese.
Cover tightly with foil and bake 30 minutes in a 350 degree oven. Remove foil and bake for another 10 minutes or so until the top just starts to turn a golden brown.
Notes
NOTE: I use basically whatever pasta I have on hand to make this recipe.