Hi, I am wanting to make the Chicken stuffed pasta shells, however the recipe calls for 1/3 ricotta cheese and 2/3 mozzarella cheese. I'm not sure what the 1/3 is of or what the 2/3 is of, ie. how big should the ricotta and mozzarella be to start off with to then use 1/3 and 2/3s of. Thanks