Rainbow Roasted Veggies September 5, 2020February 1, 2020 by Dr. Donna Goldstein Directions 1 Place a variety of colorful veggies on a nonstick roasting pan. 2 Sprinkle lightly with a drizzle of balsamic vinegar and olive oil. 3 Season with your favorite seasongs. I like rosemary sea salt, pepper, garlic and tumeric. 4 Roast about 20 minutes at 400°F. PS I had pre-cooked these sweet potatoes for about 20 minutes.