Stagg Chilli in a can, with vegemite on toast....Only when I'm hungover, and it sure does the trick!
When I was in HS we used to go on Outward Bound (10 day bushwalking caving rafting abseiling type thing) every year and we had to carry all our food with us so a lot of what we had was canned or dehydrated. My lunch speciality was a Ryvita biscuit with canned tuna, a slice of cheese, creamed corn, no names SPAM and canned beetrot all on top. The degustation of camp menus I would say!