Boniato (also called batata or tropical sweet potato) is a white, starchy, and dry version of the common sweet potato. It’s popular in Florida and the Caribbean, but well-known throughout the Americas and some of Europe (Spain in particular). It was cultivated as far back as 1,000 years ago in Central and South America. Its skin is red-to-purple in color, and has white flesh. As far as I can tell, it is nearly identical to the Japanese sweet potato in terms of appearance and taste; considering the fact that sweet potatoes were a late addition to Japan (around the 17th century), I’d guess that the differences between the two is minimal. I’ve also seen identical sweet potatoes labeled as Korean sweet potatoes here in Maryland.
Taste-wise, boniato is like a cross between a white potato and sweet potato. If you’re missing the consistency of white potatoes but react poorly to them, this is the dish for you.
Preparing boniato is easy. Because the potato is naturally creamy, you only need to add a little cream to them to get a truly decadent flavor. If you’re dairy-free, they’re still surprisingly creamy when made with only chicken broth.
The Domestic Man 