spanish omlette all meals. 20 minutes, lasts the entire day
if you want something more healthy curries are amazing since they take almost no effort to clean up but making the rice will take 30 minutes. I personally just cook asian noodles with my curry since it takes much less time.
Pasta is 7 minutes so if you get a pot of water boiling and make the sauce and just dump it in 7 minutes before you finish your sauce its a nice and easy15 minute meal. Good place to start would be to get some ground beef and sautee them, of if you're adventurous you can make meatballs but they take a long time and it's really messy. Then just make a bunch of meat sauce and you can put it in the frig and just cook pasta.
If you want a side of salad the easiest meals would be just to sear a piece of meat or fish, toss a salad, and serve with rice or pomme puree. A fried egg is also really quick just put some oil into the pan you used to sear your meat and fry it off there; saves you doing 1 dish which is probably the most painful part about cooking is washing/cleaning your shit after youre done.