I usually have no access to a fridge and most days also no stove. This creates some challenging choices when buying food. I am also moving from place to place and this developes some interesting experiences. Most of the time however, there is access to hot water by using a kettle water cooker.
this is how I eat and what works for me:
If I can, I go out for beers, pizza or pick up half a grilled chicken from the market.
However, I do not have to. I can feed myself straight out of my handbag.
Additionally, it is very filling and very healthy.
I am not a "prepper", just organized and flexible.