Preheat oven to 450°.
To prepare sauce, place first 9 ingredients in a food processor or blender; process until smooth, scraping sides. Cover and chill.
To prepare potatoes, combine potatoes, oil, pepper, and salt in a jelly roll pan or shallow roasting pan coated with cooking spray, tossing to coat. Bake at 450° for 35 minutes or until tender, stirring occasionally. Serve with sauce.