Cruise? Is the boat yours or are you doing a delivery with the owner on
board (i.e. cheap charter:-)?

My wife makes most meals before a long offshore passage because we have
hit big seas that have put us on a major diet for days on end on
account of that you can't cook in 25-foot seas!

We do chicken sandwiches and other types of sandwiches, Lasagna
sometimes because you can heat it up easily in an oven. Spaghetti,
believe it or not, is pretty easy to make in mild seas. Danish if you
are only going to be out of touch for a short while. Cereal is OK on
calmer days. Lots of fruit is good.

Citrus fruits can be washed in a very diluted beach water (if you can
smell it, there is too much bleach) rapped in aluminum foil and kept
good for months. We had lemons that we bought in San Diego that were
still good when we got to the Panama Canal 4 months later!

Crackers and chips are good snacks but you need to work off the fat
later. Pop Tarts are a life saver when the seas get over 15 feet and
sloppy.

Eggs stay fresh if you eggs that have never been refrigerated. When you
go to buy eggs in most 3rd world locals, you will find that you buy
them one at a time and transport them in an inflated plastic bag.
Camping places have hard shell plastic cases that hold 6 - 12 eggs.
Those are the best transports we've found and rarely have a broken
egg even in the roughest dingy launchings. You might want to buy a
dozen or so of the cases. We found that people in the small towns love
them and love you for the little gifts from the outside world.

Drink mix is a must. Boat water sucks. We bring lemonade ice tea and
Gatorade mix. We also bring powered milk and the type of milk that you
don't need to refrigerate.

What you need to take or do with it depends on where you are sailing
and how long you need to be offshore. Most of the time you can find
everything you need along the way. Most small towns in small nations
have one big day for produce. If you show up and buy out the supplies
of the town you will not be smiled at much so go to town and ask when
that day is. If you find a shop owner you can tell them your needs and
they will order what you want. If you don't tell them, you won't
get what you want and you will end up taking the food from the many
people that were depending on it being there.