Preheat oven to 350°F and grease a 9×13-inch baking dish.
Lay noodles flat on a damp towel to prevent sticking.
In a bowl, whisk ricotta, Parmesan, egg, garlic powder, salt, and pepper until smooth.
Spread 1 cup of Alfredo sauce in the bottom of the dish.
On each noodle, layer ricotta mixture, 2 tbsp Alfredo sauce, shredded chicken, and 2 tbsp mozzarella; roll up and place seam-side down.
Repeat with remaining noodles and arrange rolls snugly in the dish.
Pour remaining Alfredo sauce over rolls and sprinkle with remaining mozzarella.
Cover with foil and bake for 25 minutes until sauce bubbles gently.
Remove foil and bake for 10 more minutes until cheese is golden around the edges.
Let rest for 5 minutes, garnish with parsley, then serve.
Notes
To prevent noodles from sticking, keep them separated on a damp towel.Resting the baked rolls helps the sauce thicken and makes slicing cleaner.Store leftovers covered in the fridge for up to 4 days; reheat at 350°F until warmed through.