Split pitas; cut each half into 8 wedges. Place wedges on a baking sheet. Coat with cooking spray; sprinkle with 1/4 teaspoon pepper and salt. Bake at 375° for 12 minutes or until crisp.
Combine remaining 1/4 teaspoon pepper, basil, and next 4 ingredients (through garlic) in a blender or food processor; process until smooth. Scrape into a serving bowl using a rubber spatula. Garnish with basil sprigs, if desired. Serve with pita chips.