Preheat oven to 375°F; spray a 9x13-inch baking dish with cooking spray.
Brown beef in a large skillet over medium-high heat; drain excess fat and mix in marinara and water well.
Mix ricotta, 1 cup mozzarella, Parmesan, egg, Italian seasoning, salt, and pepper in a medium bowl until smooth.
Spread 1 cup meat sauce in prepared dish's bottom; layer uncooked noodles, half the ricotta mixture, and one-third of remaining sauce.
Repeat with noodles, remaining ricotta, and half the remaining sauce; top with final noodles and remaining sauce.
Cover tightly with foil; bake 50 minutes. Uncover, sprinkle with remaining 1 cup mozzarella, and bake 10 minutes, until cheese melts and bubbles.
Stand 10 minutes before cutting and serving.