Whenever we have a few lumpy potatoes leftover, sprouting onions or any other vegetable that has seen better days, we turn them into a bottom of the fridge soup to have for a light supper and lunches during the week. It's really simple to do, and you've just got one pan to wash up – my favourite kind of cooking!
Whatever you have left at the bottom of the fridge, why not add that in too? Or just make your own concoction and see what you whiz up.