Rob if you can cook it at home on a stove you can cook it on a Frontier stove but for a knackered solo hill walker who don't want to spend an hour or more making food from scratch and who has no refrigeration try something like :-
Your tinned meat and veg is a fast stew (mixed veg not peas),
Try and all day breakfast omelette, fry diced sausage, bacon, mushrooms and onion in your frying pan and when cooked add four whisked eggs and top with grated cheese and fold the omelette over to melt the cheese, that will set you up for the day.
A can of chicken in white sauce (£1 a can in Iceland stores), add a dollop of Korma/madras paste and a BIB rice is another option for a cheats curry.
Corn beef, onions, peppers, mushrooms, canned butter beans, stock cube stew (not too much water) and thicken with an Ox tail cup o soup, serve with BIB rice or some pasta.
Diced pork (belly is best), dice and fry with onions, mushroom and diced potatoes add a can of baked beans when other ingredients are cooked.
Simple fast food to prep after a hard day on the hills, its not **** star but for solo camping will hit the spot for you.
Have fun and keep safe in them thar hills.