Preheat oven to 425°.
To prepare vegetables, place first 6 ingredients in a single layer on a jelly-roll pan coated with cooking spray. Lightly coat vegetable mixture with cooking spray. Sprinkle evenly with 1/2 teaspoon salt and 1/4 teaspoon black pepper; toss. Bake at 425° for 1 hour or until browned. Transfer vegetable mixture to a large bowl.
To prepare pesto, combine basil leaves and remaining ingredients in a food processor; process until smooth, scraping sides. Spoon basil mixture over vegetable mixture, and toss to coat.