For the shopping list
Large Sweet Potatoes, preferably orange varieties
From the kitchen
Preheat oven to 350F.
Cut the sweet potatoes into 1-inch cubes (peeling optional).
Use mortar and pestle to grind together the sugar (the Okinawan sugar can be lumpy), cumin, seeds and peppercorns (a blender or spice grinder will work, too). If you’re using the habanero, chop it very finely; removing the seeds and white membrane will cut the heat a bit.
Spread sweet potatoes in a single layer on a sheet pan. Roast for 20-30 minutes, stirring a few times, until they can be pierced easily with a fork and are nicely browned.