Another useful gadget is the 'jaffle iron' - usually dual small pockets which are intended to seal two bread slices around a small quantity of filling. You can also cook an egg/scrambled egg in them, but it can stick. Older 'Scouts' may remember such gadgets designed for use over an open fire - these can be used on a gas stove too.

There two types, I prefer the one WITHOUT the diagonal cutter so that I get one large square pocket, instead of two triangular ones.

The 'pie makers' where you take two slices of pastry and use a filling can be used for many similar snacks - and you CAN use pastry in the jaffle iron, but if you have limited resources and little refrigeration, it's probably difficult to keep frozen pastry slices and making up good pastry to order in very small quantities can be difficult.

You can get various small cans/jars of may things that need no refrigeration, such as creamed corn, mushrooms, deviled ham, specialised 'jaffle fillings' cans, etc. Cheese, tomato slices, spam slices, etc also are useful.

I notice that you can now get 'omelette makers' - small pockets designed to cook scrambled eggs. Also small doughnut makers, and similar gadgets. Personally I think the jaffle iron and plate sandwich toasters are more versatile.

I also still have a toaster oven - a brilliant Delonghi full small over with top and bottom elements with fan, that I use less now that I discovered the sandwich toaster plates....

:-0