1In 5-quart Dutch oven, place turnips and potatoes; add enough water to cover. Heat to boiling; boil uncovered 15 to 20 minutes or until tender. Drain.
2Meanwhile, in 10-inch nonstick skillet, cook bacon over medium-high heat 5 to 6 minutes or until crisp. Drain on paper towels; reserve 2 tablespoons drippings in skillet. Crumble bacon; set aside. In reserved drippings, cook apples over medium-high heat 6 minutes, stirring frequently, until tender and lightly browned.
3In large bowl, mash turnips, potatoes, apples, garlic and thyme with potato masher until blended (mixture will be chunky). Stir in buttermilk and melted butter. Season with salt and pepper. Sprinkle with bacon.