Once you have grated and measured the sweet potatoes, put them in a potato sack towel or a cheese cloth and wring out as much liquid as you can over the sink.
Then place all the ingredient in a mixing bowl and mix by hand. It's easier to properly distribute the spices with your hands than with a wood spoon or spatula.
Grease a 7 X 10 baking dish and transfer the sweet potato mixture to the dish.
Flatten out the potatoes so you have a nice, even layer on top.
Place in the oven for 50-60 minutes, or until the potatoes are fully cooked.
Remove from oven, cool slightly, slice into 9 servings and serve.
Notes
Please note that the nutrition data below is a ballpark figure. Exact data is not possible.