1Heat oven to 350°F. Split each pita bread horizontally to make 2 rounds. Cut each round into 6 wedges. Arrange on ungreased large cookie sheet, rough surface up. Spray with cooking spray (about 5 seconds).
2Bake 8 to 10 minutes or until golden brown and crisp; cool.
3Meanwhile, spread hummus on shallow serving platter or in pie plate. In small bowl, mix yogurt, parsley, lemon juice and pepper; spread evenly over hummus. Top with tomato, olives, chopped cucumber, feta cheese and onions. Drizzle with olive oil.