This was interesting. I just took a short ride--27 miles or so. I ate only a clif bar before I left. I was riding to the beach where we were going to have breakfast. I was bonking within the first seven miles. I have to have food before I ride or I don't ride. I stopped at someone's house where I got a jelly sandwich. All was fine then. I just don't have the experience that it is a matter of what you ate the day before. I must have a good breakfast (lots of carbs) or forget it. And I've been riding lots of miles for many years. Pasta at 6 a.m. just sounds nasty.