Three-Cheese Jumbo Shells

Directions

1. 1
   In a large skillet, cook beef and onion over medium heat until the meat is no longer pink; drain.
2. 2
   Stir in the water, tomato paste, bouillon and oregano.
3. 3
   Cover and simmer for 30 minutes.
4. 4
   Meanwhile, in a large bowl, combine the ricotta cheese, 1 cup mozzarella, Parmesan cheese and egg.
5. 5
   Stuff shells with the cheese mixture.
6. 6
   Arrange shells in a greased shallow 3-qt.
7. 7
   baking dish.
8. 8
   Spoon meat sauce over shells.
9. 9
   Cover and bake at 350 degrees fahrenheit for 30 minutes.
10. 10
    Uncover; sprinkle with remaining mozzarella cheese.
11. 11
    Bake 3 to 5 minutes longer or until cheese is melted.