I will admit, hard to do as a chef, but we always have some canned soup on board. I prefer Progresso of different varieties, try to find the low sodium ones. A hot clam chowder is pretty tastu on a chilly day.
Other must have items would include...
Salami and other dried meats.
Canned beans and sauces can make for quick meal as well, I like some of the Indian Sauces...just add vegetables or meat and or seafood
Dried beans and rice are great, but both take a while to cook which also uses a lot of fuel, why its good to have the canned.
Canned fish suck as tuna or salmon, sardines, etc are good protien sources and easily mixed or eaten as is.
Olives, nuts, and similar are always on board.
Dont forget the rum and wine!