Why does my stomach complain/talk/grumble/make noises around the same time everyday?

I eat breakfast then about 2-3 hours later it starts making sounds. Should I just eat a heavier breakfast? I usually eat at least one sandwich for breakfast. Later in the day though, I eat heavy meals. Maybe it wants heavy meals earlier in the day? I usually eat a granola bar when it starts talking (only thing I can eat during class) and it does stop. Would eating a heavy breakfast solve the problem?