Roasted turnips and shallots are tossed in a vinegar-thyme glaze that has a touch of brown sugar.
Preheat oven to 400 degrees. Put turnips, shallots, and oil on a rimmed baking sheet. Season with salt and pepper; toss. Spread in a single layer. Roast until tender and golden brown, about 35 minutes.
Put vinegar, bay leaves, and thyme in a small saucepan. Bring to a simmer; cook until reduced by about half, about 10 minutes. Add sugar and 1/2 teaspoon salt; stir to dissolve. Add butter, and cook over medium heat until reduced to a syrupy glaze, about 10 minutes. Discard thyme. Pour over roasted vegetables; toss to coat. Serve immediately.