This might not be exactly what you're asking for, but it's worth noting the power of leftovers if you haven't already! If you're bothering to cook, most of the time it hardly takes any more time to cook twice as much as you're going to eat right now, or even more. That's at least one more meal for the next few days solved. If you have a freezer, developing a small stockpile of frozen leftovers in it is excellent for the fast-to-prepare dimension. Also note that preparation time speeds up a lot with practice.