GENTLY wash beets; pierce in several places with fork. Place beets in centre of large sheet of foil. Drizzle with 1/4 cup dressing. Fold up sides of foil to enclose beets; seal foil packet tightly.

BAKE at 400°F for 45 minutes or until beets are tender. Open foil; let beets stand in foil until cooled. To peel, gently rub skins of beets with cloth or paper towel until skins are removed. Cut into wedges.

MIX remaining dressing and orange juice in large bowl. Add beets; toss to coat. Set aside.

ARRANGE avocados on serving platter; top with layers of onions and beet mixture. Sprinkle with parsley and orange peel.