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.