I am lucky enough that I live close enough to work to go home for my lunch break. But that means lunch has to be fast. And in the evenings I often don't have time for complicated cooking.
I have started to so cooking ahead on the weekends. I will usually make a few frozen meatloaves, that gets me a few meals a week and reheats well in the micro. I have also become dangerously dependent upon frying frozen corn in a small pan, sprinkled with a bit of garlic, pepper, and grated parm. I also fry up preboiled potatoes. I usually make an almond or banana bread on the weekend too which serves as breakfast.
Then again, I can be a pretty boring eater.