Directions1. Preheat oven to 350°.
2. In a large bowl, combine ricotta, 1 cup mozzarella cheese, egg, spinach, salt, pepper and oregano.
3. Spread 1/2 cup spaghetti sauce in greased 13x9-inch pan. Place 1/3 of noodles over sauce and cover with 1/2 of cheese mixture. Repeat layers
4. Top with remaining noodles, spaghetti sauce and mozzarella cheese.
5. Pour water around edges and cover tightly with foil.
6. Bake for 1 hour and 15 minutes.
7. Let stand 15 minutes before serving.