Cook the pasta shells according to package instructions until al dente. Drain and set aside to cool slightly.
In a large bowl, combine the shredded chicken, ricotta cheese, mozzarella cheese, Parmesan cheese, garlic powder, Italian seasoning, salt, and pepper. Mix until well combined.
Take each cooked pasta shell and fill it generously with the chicken and cheese mixture.
Pour 1 cup of Alfredo sauce onto the bottom of a baking dish to create a base layer. Arrange the stuffed shells in the dish, seam side up.
Drizzle the remaining Alfredo sauce over the stuffed shells, ensuring they are generously coated.
Sprinkle extra mozzarella cheese on top, for a cheesy finish.
Cover the baking dish with aluminum foil and bake for 25 minutes.
Remove the foil and bake for an additional 10 minutes, or until the cheese is bubbly and slightly golden.
Remove from the oven and let it cool for a few minutes before serving.
Garnish with freshly chopped parsley for a pop of color and flavor.
Notes
Feel free to use homemade Alfredo sauce for a richer flavor.