Preheat oven to 375°F; spray a 9x13-inch dish with cooking spray.
Spread 1 cup marinara in dish.
Mix ricotta, 1 cup mozzarella, Parmesan, Italian seasoning, and garlic powder in a medium bowl.
Layer half the frozen ravioli over sauce; dollop half the cheese mixture over and spread gently.
Pour half the remaining sauce over cheese; repeat with remaining ravioli, cheese mixture, and sauce.
Cover tightly with foil; bake 30 minutes.
Uncover; top with remaining 1 cup mozzarella and bake 5 more minutes until melted and bubbly.
Let stand 5 minutes before serving. Garnish with fresh basil if desired.