Those tortellini things in packets. You just boil them for three mins and you can stir a ready made pasta sauce like pesto through or even just cream cheese. They're tasty.
Beans in toast
Spaghetti and sauce with hot dog sausages
Cheese toastie with soup
Buy a chicken from the hot counter... you could get a jar of curry sauce and have chicken curry or stir fry pack. There's loads of things you could do with ready cooked chicken. Baguette, coleslaw etc
Microwave a jacket potato and have it with cheese snd beans. Ham and cream cheese. Tuna Mayo.
Tuna pasta sweetcorn
Just stir garlic, oil, chilli through spaghetti, could maybe add some prawns and feta. (This one would require chopping things though).
Oven pizza, the ones at the counters at supermarkets are good, especially if you add extra mozzarella
Of course there are always ready meals. Depends on budget but m&s ones are just as good as takeaway IMO.
Noodles on toast. Indomie and mama noodles are both delicious, you could add a fried egg on top.
Fish fingers chips and beans. Or chicken nuggets, Kiev, frozen pie etc .
Rice and stir in egg, frozen peas, frozen chicken or quorn, or prawns etc, anything you like really.
Somethings I just make cuscus and put loads of veg and chicken in it with maybe a squeeze of lemon and some feta.
If you have the energy at any point, a chilli is very easy to make and if you put it on a low heat you can do it in your own time and just add things as you feel capable. This could last you quite a few days as well, same with spaghetti Bol.