When winter howls outside there is nothing more soothing than a bowl or cup of thick soup. The orange juice and spices in this recipe lend it the slightest tang and piquancy without interfering with the wholesome veggie taste. This is my own recipe, but this time I measured the ingredients instead of chucking it into the pot by feel! Do not leave out the sugar (or a substitute), as it is essential. Best of all: this soup SHOULD be made ahead, because standing for a few hours or overnight in the fridge develop the flavours. Servings are a guess, because a large bowl with bread can be a meal on its own, or a small helping could be the starter to a winter night's dinner. Butternut can be used instead of sweet potato or yams. For a thinner soup the potato can be left out.