Re: Obvious answer is obvious. And one word.
This. And the good cook. He has an incentive if he doesn't want to become lunch...
I suspect managing changes in flavours might well be the significant chore. Perhaps the crew might be allowed a kilo of their favourite herbs and spices? No coriander/cilantro for me, thanks.
Funny how with a whole planet to choose from, as a species we basically get by on a handful of plants for our carb and protein needs, and a rather larger handful for flavour.