This winter I got a deal on sweet potatoes. They are excellent condition and although they don't store as well, they aren't bad if cooled for a couple of months. Very tasty carbs and surprisingly good for most. Diabetics should try some and test too. Other things on sale lately are cabbage, which can be fermented. Onions too, as celery and anything produce in season. Right now, I'm prepping for the spring garden.
Learn about wild edibles for foraging and planting.
