Cook whole sweet potatoes covered, in boiling water to cover, until nearly tender.
Preheat oven to 375°F.
Cut the potatoes lengthwise in 1/2 inch slices. Place the slices in a shallow greased baking dish. Add pecan pieces if you are using them. Season with salt and paprika. Sprinkle with brown sugar, ginger, lemon rind and lemon juice. Dot with butter.