Peel and cube turnips (should have about 3 cups). Cook turnips, covered in small amount boiling salted water until tender. Drain, add butter and mash. In bowl, combine remaining ingredients. Add mashed turnips. Pour into ungreased 3- to 4-cup casserole, uncovered. Bake at 375 degrees for 25 to 30 minutes, or until set. Garnish with sprig of parsley "chust for nice."