Step 1: Preheat oven to 375°F (190°C) and grease a 9×13 inch baking dish.
Step 2: Cook lasagna noodles according to package directions until al dente, then drain and set aside.
Step 3: In a medium bowl, mix ricotta cheese, ½ cup Parmesan cheese, garlic powder, Italian seasoning, salt, and pepper.
Step 4: Spread ½ cup Alfredo sauce evenly in the bottom of the prepared baking dish.
Step 5: Place 3 lasagna noodles over the sauce, then layer with ⅓ of the ricotta mixture, ⅓ of the shredded chicken, and ½ cup Alfredo sauce.
Step 6: Repeat layers two more times, ending with a final layer of noodles.
Step 7: Top with remaining Alfredo sauce, mozzarella cheese, and remaining Parmesan cheese.
Step 8: Cover with aluminum foil and bake for 25 minutes.
Step 9: Remove foil and bake uncovered for 10-15 minutes until cheese is bubbly and golden.
Step 10: Let rest for 10 minutes before serving. Garnish with fresh parsley if desired.