I will be taking an 8 hour exam on Saturday that I have been preparing for for the last 6 months. I want to pack a lunch that will be wholesome and give energy and keep me full through my second half of the test. Whatever I bring will have to be out of the refrigerator for about 5 hours and I won't have a microwave. I have no idea what to bring...I am trying to avoid shakes and bars. Any thoughts?

--Cindy