Peel turnips. Slice thickly. Parboil by dropping into boiling water for a few minutes. Drain. Then place in fresh boiling water with some salt. Boil until quite tender. Drain well. Place turnip slices in baking dishes. Make a sauce by placing 4 lb. of butter and 4 cups of prepared Dijon mustard in a pan and heat just until butter is melted, stirring to blend. Pour mustard sauce over dished turnips, making sure all turnips have some sauce on them. Sprinkle each dish lightly with nutmeg. Bake 5-10 min. at 350 degrees.