I love soups- especially as I sit in my living room, watching the snow fall, in November.  A little too much snow, too soon.  I can look forward to the sweet smells of soup simmering on the stove.
If you cannot find Jamaican pumpkin, feel free to improvise- regular pumpkin or other orange squash.  Same for the white yam- carrots, regular yam or sweet potato.
You can also roast the squashes in the oven to make it easier to peel and dice.  Just wrap in foil and place in a hot oven for 45 minutes to an hour.
To serve about six...