I have a wide variety depending on whether I'm cooking for myself, eating with others, and what is going on.

Generally in the mornings I make either over easy eggs with toast or breakfast burritos as both csn be whipped up in about 10 minutes with minimal cleanup. If I'm lazy in the evening I might make a can of soup with crackers, or beanie weenies that I can eat over a few meals. If I get some time and motivation on the weekend I will cook down onions, bell peppers, and jalepenos to use on the eggs and breakfast burrito during the weekdays.

Other than that it is fast food/takeout if I'm busy or unmotivated and if motivated I will make something random that takes around 6 ingredients because that is about my limit. Home made burgers, grilled vegetables, steaks with a side of broccoli or corn, etc.

Then if I have workplace appropriate leftovers I take those, although they also have salads for sale. I work from home 3 days a week and heat up whatever leftovers are around.

If you are absolutely unmotivated then simple sandwiches with an apple on the side worked for me when I didn't cook enough for leftovers.