Most of what people have already said plus Ainsley Harriot cup a soups and John West 85g sachets tuna with lime and pepper, eaten with packet lemon and coriander couscous. One packet of couscous and a tuna sachet does me 2 meals, but then I don't eat very much.
Also Manchego cheese, very hard, made from ewes milk and keeps well. I do my own dehydrating and I find that stews with lentils or beans, with or without meat, and lots of garlic or chilli or both dry easily and reconstitute without too much fuss as long as it is rubbed small when dried. I store the dried food in weighed out small sandwich bags within a bigger freezer bag in the freezer so it's not hanging around in warm moist air for months at a time.
In one of the huts on the Laugavegur trek in Iceland, we were offered dried fish with masses of butter on it, as an Icelandic trekking speciality. We returned the favour with shots of Laphroaig. We didn't share much language and we were all very polite but we had the distinct impression that they thought as much of the Laphroaig as we did of the dried fish with butter.