01 -
Cook the jumbo pasta shells according to package instructions. Drain and set aside.
02 -
In a large bowl, mix ricotta cheese, grated Parmesan, chopped cooked mushrooms, egg, garlic powder, salt, and pepper until well combined.
03 -
Spoon the mushroom mixture into each pasta shell, filling them generously.
04 -
Preheat the oven to 375°F (190°C). Spread 1 cup of Alfredo sauce on the bottom of a baking dish.
05 -
Arrange the stuffed shells in the baking dish. Pour the remaining 1 cup of Alfredo sauce over the shells.
06 -
Sprinkle shredded mozzarella cheese over the top of the shells.
07 -
Cover the 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 golden.
08 -
Let the shells rest for 5 minutes before serving. Garnish with extra chopped parsley if desired.