Eat more on rides. One roll is not going to do much. I drink (big gulp) every 5 minutes and take a bite of something (usually a powerbar or banana or nuts) every 15 minutes. Don't wait until you are depleted to eat. After rides, I like to have chocolate milk, although I may have to find an alternative since I'm seeing how it goes to give up sugar.

Make sure you drink water after your ride, too, including the next day.