Place the turnips in a single layer in a 12 inch heavy skillet; add water to reach halfway up turnips (about 1 1/2 cups). Add butter and the next 3 ingredients. Cover and bring to a boil over high heat; reduce heat to medium-high, and cook, stirring occasionally, 10 minutes.
Uncover and cook, stirring often, 8 minutes or until the turnips are tender and the water has evaporated. Cook, stirring often, 5 more minutes or until the turnips are golden. Stir in sorghum and 3 tablespoons water; toss turnips to coat. Serve immediately. Garnish if desired.