In a medium sauce pot mix together a full jar of Bertolli® Organic Traditional Tomato & Basil Sauce and Bertolli® Organic Creamy Alfredo Sauce. Stir over medium-low heat until combined.
In a baking dish spread about 1 cup of the Rosa Sauce that you just made. Top with your frozen stuffed shells. Finally, top the shells with another cup or cup and a half of Rosa Sauce.
Bake acording to the Frozen Shells Package instructions.
When done, top with some grated parmesan cheese if desired, and serve with additional rosa sauce.