This soup recipe is simple, hearty, warming and incredibly good for you. It contains 5 portions of veg, it is very low in both calories and fat and (thanks to the spuds) is also filling. This particular recipe makes 3L of soup. Enough for 10 servings (soup for 2 people for 5 days). Obviously if you don't want that much soup, reduce ingredients proportionately. However, it keeps for up to a week in the fridge and you can freeze it.