When root vegetables are in season, take advantage of ingredients like turnips by combining them with other autumn favorites like fresh apples. I've added cider vinegar and orange blossom honey to bring even more flavor to this dish.
Preheat the oven to 425 degrees F. Melt the butter in a small saucepan over low heat. Quarter and slice the peeled turnips into ¼-inch slices. Place in a medium mixing bowl. Slice the scallions into 1" to 2" segments and add to the sliced turnips. Drizzle the melted butter over the turnip/scallion mixture. Season with salt and pepper, to taste. Quarter, core, peel, and cut 1 of the apples into ¼-inch to ½-inch slices. Add to the turnip mixture. Toss gently to coat. Spread the turnip mixture onto a rimmed baking sheet lined with parchment paper and place in the oven.
After 10 minutes, toss the mixture on the tray, to promote even browning and caramelization. Return the tray to the oven on the bottom rack for an additional 10–12 minutes.
Remove the tray from the oven. Drizzle the honey over the vegetables and return to the oven for an additional 1–2 minutes.
Remove the tray from the oven. Drizzle the apple cider vinegar over the warm vegetables. Toss gently to coat. Mound the turnips and apples on a wide platter, and shave the remaining apple over the warm vegetables. Serve immediately.