I heard about that from many of my relatives who fought in WW II and Korea especially. Many of them hated it, but a lot of them liked it, and ate it regularly until the day they died.
One common one I heard from people who grew up in the depression in both sides of my family was Grilled bell peppers and onion sandwich cooked in olive oil, water and vinegar, the peppers and onions came fresh from their victory garden. Which from the pictures all of them were huge gardens sometimes spread out over multiple yards, making enough to feed dozens of families.