I've kept
perpetual stew going for over a month having never been refrigerated and there are commercial joints that do so for years on end. Right now, it's chili that has enough sweet potato in it that some folks might balk at calling it chili. Anyway, we do the same thing keeping soup or stew around all winter, at least.
We also go through a pot of beans every week starting with a pound or pound and a half of dry beans. Sometimes that goes into the soup, sometimes it becomes a fresh chili or frijoles or beans-n-rice. Occasionally it's chikpeas and becomes hummus or curry instead.
We cook good food for all our meals and don't really seem to have a problem keeping that healthy. Our problem and it's true for everyone in my family is between meal snacks. I've been buying a lot of celery so that I have something crunchy to go after. If I cut it up on the weekend and put it in a tub of water in the fridge, it stays good all week.