Stuffed Shells are a very popular Italian preparation in American households. Stuffed Shells Recipes include pasta shells as the main component. These shells are boiled till al-dente and then stuffed with a filling of parmesan cheese, shallots and celery. Once stuffed, the shells are closed and placed in a baking dish, topped with marinara sauce and mozzarella chunks and then baked. This dish is loaded with lots of cheese and is a well-liked by kids.