Some really good ideas here!
As I don't have a freezer
I make bolognese sauce with corned beef instead of ground beef unless I have home canned/bottled ground beef ahead of time. I don't have a refrigerator
just an ice box which can take up to 10kilos of ice.
My pressure cooker is a godsend, I make up a meal (pasta and sauce, chili con carne and rice, rice with tuna, onion and sweetcorn etc), I bring it up to pressure, turn the heat off and then leave it on the stove with the lid on, whatever the meal is keeps for a couple of days as long as it is not opened. If it's opened, then I repeat the process of heating
up with the lid on. Because the lid locks in place, should the pressure cooker leap off the stove (not happened yet in 20yrs of cruising) the food
stays inside instead of all over the cabin
I do get seasick, in fact on our last passage
to Langkawi, Malaysia
I was sick for 10 days and Rob had to do all the watches, I barely managed 1 three hour watch in 24 hours. Luckily, we had innumerable tins of baked beans and sausage, lots of crackers and cheese (preserved in oil) so Rob could get something to eat when he needed it.