Have a think about what meals you could prepare with your tins, some should be things you are happy to eat cold.
Tinned potatoes can be mixed with mayo and if you like a touch of mustard to make a potato salad.
Hot dog sausages are fine to eat cold as are a lot of the tinned fish options, you can get tinned fish with various flavourings, I like mackerel in tomato sauce.
On these threads I'm always referencing WearyWolfAdventures on YouTube.
He did a potato salad with prep food the other day, his had sweet corn in it.
One of his other hints / tips is that tinned food that is tinned in water, save the water for other cooking eg (and this assumes you have a method of cooking) if you want to make a pasta dish drain a tin of peas or whatever and use that water to cook the pasta then add the peas in to the cooked pasta.
Tinned fruit can give you a sweet hit, either eaten cold or if you have a cooker the basis of a crumble / pie.
Also have a think about jars and packets. Pickles last years and if you are down to eating cold tinned food a bit of pickled cabbage can pep up a meal. Pickled eggs might not be something you normally eat but again you might if your diet has been a bit boring for a couple of days.
@wanderingwillows
It depends on the emergency, you may have power or you may not also you may have a camping stove or a BBQ.
I think there are 3 types of emergency, 1 where you cannot go out for whatever reason but you still have a working cooker / microwave
2 - you have gas but not electric / or you have electric and no gas
3 - you have no power or gas and the shops are shut.
I use either a mobility scooter or a wheelchair, neither is much use in snow and once snow is there it can take a long time to clear. So I always have things in that I can eat with little prep.