9 tablespoons unsalted butter, divided (1 for the skillet, 8 for the sauce) 4 1/2 pounds mixed beets and turnips, peeled and sliced thin...

8-12 slender carrots, peeled and trimmed 8 turnips, peeled 6-8 fingerling potatoes, scrubbed and cut length wise in halves 1-2 parsnips,...