Preheat the oven to 375F. Spray a cast-iron skillet with olive oil spray.

Slice the turnips on a mandoline, and divide them into three piles.

Mix together the cream, ¾ cup of the cheese, and the black pepper.

Layer one third of the sliced turnips into the skillet, then top with a third of the cream mixture. Repeat for two more layers.

Sprinkle the remaining ¼ cup cheese over the top, and roast for 25-30 minutes or until the turnips are tender. Cover with foil during cooking if the top is browning too fast.