Toss beets with 1-1/2 tsp. oil; spread onto half of large rimmed baking sheet sprayed with cooking spray. carrots with remaining oil; spread onto other side of baking sheet.
Bake 25 to 30 min. or until vegetables are tender. Cool 5 min.
Cover large platter with salad greens; top with roasted vegetables and radishes. Drizzle with dressing; top with cheese.