Re: provisioning for a 400 mile passage..
Take pipas, the green young coconuts. They are good with the tops sliced off and drunk straight from the hull. A straw helps! They keep with out a fridge and are naturally cool.
I would take eggs stowed low in the cooler part of the bilge. Just open them one at a time in a separate container from what your are cooking in. You will know if there is a bad one. Excellent protein and opens the baked goods repertoire! Egg salad sandwiches with a little minced black olive is good.
Cabbage and pineapple make good slaw with mayo.
I bet you have a BBQ. Make your own dough and take cheese and cherry tomatoes. They keep well and make a great little pizza. Then it's fresh ; -)
Have a good sail and turkey day!
ain't what ya do, it's the way that ya do it...