Preheat your oven to 350°F (175°C). Lightly spray a 9x13 inch baking dish with non-stick cooking spray.
If using regular noodles, cook them according to package directions until al dente. Drain and lay them flat.
In a medium bowl, combine the shredded chicken with 1/2 cup of the alfredo sauce.
In a separate bowl, mix the ricotta cheese, egg, Parmesan cheese, parsley, garlic powder, and black pepper.
Spread 3/4 cup of plain alfredo sauce on the bottom of the prepared baking dish.
Place 3 lasagna noodles over the sauce.
Spread half of the ricotta cheese mixture over the noodles.
Spoon half of the chicken mixture over the ricotta layer.
Drizzle 3/4 cup of alfredo sauce over the chicken, then sprinkle with 1 cup of mozzarella cheese.
Repeat the layers: noodles, remaining ricotta, remaining chicken, 3/4 cup alfredo sauce, and 1 cup mozzarella.
For the final layer, place the last 3 noodles on top. Spread the remaining alfredo sauce over the noodles and sprinkle with the final cup of mozzarella cheese.
Cover the dish tightly with foil and bake for 25 minutes.
Remove the foil and bake for another 15-20 minutes, or until the cheese is golden and bubbly.
Let the lasagna rest for 10-15 minutes before slicing and serving.