HEAT oven to 425ºF.
TOSS beets with 1-1/2 tsp. oil; spread onto half of large rimmed baking sheet sprayed with cooking spray. Toss carrots with remaining oil; spread onto other side of baking sheet.
BAKE 25 to 30 min. or until tender. Cool 5 min.
COVER large platter with salad greens; top with roasted vegetables and radishes. Drizzle with dressing; top with cheese.