This is a wonderful Polish soup (vegan option) traditionally eaten on Xmas Eve. But, since we are cooking with dried mushrooms, and they keep forever, you can make it at any time of the year. I love making soups as you can pack them with as many vegetables (and vitamins!) as you want, they are easy to make and you can store them in your fridge for up to a week. So if you make a big pot, no need to cook everyday!