A staple of my many caving expeditions during the college years was Spam and rice. How else could you get a tasty, tasty meal filled with protein and carbs when you're underground, wet, dusty, and famished? I would fire up my MSR stove and soon the cave would be filled with the familiar smell of browning luncheon meat. Made me a popular guy when my buds realized their protein bars no longer made the cut.