Preheat oven to 400°. Scrub beets and trim tops to 1 in. Place beets on a double thickness of heavy-duty foil (about 24x12-in.); drizzle with oil. Fold foil around beets, sealing tightly. Place on a baking sheet. Roast 55-65 minutes or until tender. Open foil carefully to allow steam to escape.
When cool enough to handle, peel and slice beets. Divide salad greens, beets and oranges among six salad plates. Sprinkle with cheese. In a small bowl, whisk dressing ingredients; serve with salads.
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