One of my favorite winter soups is Gypsy Soup from the Moosewood cookbook. It doesn't contain animal fat or meat like some northerners crave in winter but it keeps away the chill when temperatures dip into the 50's and 60's here in SW Florida.
I add fresh ginger and vegetable bullion and improvise around the basic recipe and usually serve it with a baquette, salad and a good red wine.