From Dana Carpenter's email newsletter:
* Sweet potatoes are another traditional Thanksgiving carb food. It's nice to know that sweet potatoes, while high carb, have a lower blood sugar impact than "regular" potatoes, and contain far more vitamins. Still, we are talking roughly 30 grams of carbohydrate per sweet potato - and that's without the brown sugar, corn syrup, and/or marshmallows people tend to heap on them! What can we do?
Here's a neat trick: Combine one sweet potato, cooked and mashed, with canned, pureed pumpkin. Now, add Splenda to taste, with maybe 1/2 teaspoon of blackstrap molasses for a brown sugar flavor (you could use Brown Sugar Twin instead; I don't like the stuff,) and a little cinnamon and nutmeg. Put it in a casserole, dot it with butter, and bake it till it's hot clear through. Using one average sweet potato and a pound of pumpkin puree, and assuming you serve 6 people, each serving will have about 10 grams of carbohydrate, with 1 gram of fiber, or 9 grams of usable carb - just a third of eating a plain sweet potato.