Combine the first 6 ingredients in a jelly roll pan or shallow roasting pan coated with cooking spray; toss to coat. Bake at 400° for 35 minutes or until the vegetables are tender, stirring every 10 minutes.
Combine vegetables and bread in a large bowl. Combine chopped cilantro and remaining ingredients, stirring mixture with a whisk. Drizzle juice mixture over vegetable mixture, tossing gently to combine. Serve immediately.