They bring in lunches everyday to the Boulder City Airport. If you are flying for Scenic (or GCA in Boulder) then you can grab one on the way out the door. They are typical boxed lunches nothing special.
At GCA a few years back...if you were flying through the lunch hours they would bring you lunch where ever you wanted them to go. There werent a lot of options at the South Rim but it was pretty cool. I still remember splitting a large pizza with the Captain I was flying with and having a hard time opening the box in the cockpit (it was pretty big). They would deliver whatever you ordered (if they could find it in town) to the plane on your quick turns.