We often make a version of this in the summer. It's actually quite filling depending on how much ground taco beef/turkey you add to it. It's pretty hearty when you need it to be, and it's cold. I can't bring myself to eat a hearty hot meal on the boat on a hot day.
A tray of frozen shrimp placed in one of those stay-cool foil bags is actually pretty much perfect around lunch time as well.