01 -
Boil the jumbo pasta shells according to the package instructions. Drain and set them aside.
02 -
In a large bowl, combine the ricotta, Parmesan, cooked mushrooms, egg, garlic powder, salt, and black pepper to create the filling.
03 -
Preheat the oven to 375°F (190°C). Spread 1 cup of Alfredo sauce on the bottom of a baking dish.
04 -
Generously stuff each pasta shell with the mushroom mixture and place them in the baking dish.
05 -
Pour the remaining Alfredo sauce over the top of the shells and sprinkle with mozzarella cheese.
06 -
Cover with aluminum foil and bake for 25 minutes. Remove the foil and bake for an additional 10 minutes until the cheese is bubbly and golden.