This tropical sweet potato, also known as the Cuban sweet potato, resembles an Idaho russet: semisweet and semidry - and very versatile. Select rock-hard tubers without shrinkage or decay. Keep at cool room temperature in a well ventilated area. Peel underwater to prevent discoloring the white flesh. Cook as any sweet potato, but expect a nuttier, firmer, less sugary result. Store at 55°F.