Potatoes "On The Rocks"

Anyone who lives (or has lived) in Okinawa likely knows about the famous purple sweet potatoes (Beni Imo) and yams. What we find most interesting is how they are often cooked. Some are fire roasted as the "potato man" (as we like to call him) rides around our neighborhood and sells them from his truck. Others are cooked over hot rocks. Either way, they are simply delicious. From the moment we first sank our teeth into the goodness, we were fans.