Place sweet potatoes in 3-quart saucepan; add enough water just to cover potatoes. Cover and heat to boiling; reduce heat. Simmer covered 20 to 25 minutes or until potatoes are tender when pierced with a fork; drain. Return potatoes to saucepan. Heat potatoes over low heat about 1 minute, shaking pan often to keep potatoes from sticking and burning, to dry potatoes.