I've read that as long as one does not open the lid, it's fine to leave a pot of soup which has come to a rolling boil on the stove overnight and have some for breakfast. I have been cooking for many years and have not tested that one. lol.
@LumberJack this soup was as yet unsalted, and had a combination of lentils and veggies and a few bits of minced uncured ham, so it needed to be kept either hot or quite cold. It's when we leave food tepid or warm that the bacteria have a field day, and we or our guests can end up with gastroenteritis. I have an extra trick of asorts of adding just a pinch of ascorbic acid to a dish before storage to increase the acidity and help preserve its freshnesss. Powdered vitamin C in other words. I keep it around to add to smoothies and as an inexpensive source of vitamin C.
I forgot to add, I'm having old fashioned beef pot roast and veggies tonight, with mash on the side.