So easy and absolutely delicious! I have a very hungry marine husband and between us we barely finished 1/3 of the pan. Definitely makes more than 5 servings, and you can definitely fill more than 20 shells. I love the use of cottage cheese instead of ricotta to make it lower in fat. It has the same great consistency though! Thanks for this awesome recipe that has now made it into my wooden recipe box, along with all my grandma's.