Preheat oven to 375 degrees. Toss turnips with oil
and 1/2 teaspoon salt on a rimmed baking
sheet. Roast, tossing after 15 minutes, until
golden brown and tender, about 35 minutes.
Whisk together vinegar, mustard,
1/4 teaspoon salt, and 1/4 teaspoon pepper.
Wash turnip greens well, and tear into
3-inch pieces. Toss greens with spinach.
About 5 minutes before turnips are finished
roasting, heat a small high-sided
skillet over medium-high heat. Cook bacon,
stirring, until crisp, 4 to 5 minutes. Add
shallot, and cook until soft, 1 to 2 minutes.
Remove from heat, and stir in vinegar
mixture. Fold warm bacon vinaigrette into
greens, and divide evenly among 4 plates.
Top with roasted turnips and pecans.