Preheat oven to 425 degrees. Add all ingredients into a large bowl and stir to combine well. Place all ingredients into a metal 13x9 pan with about 1/2 cup veggie broth in the bottom. Roast for about 40 minutes, stirring often, until everything is tender and browned around the edges. Add a bit more broth if necessary. Garnish with fresh pomegranate arils.