1. Preheat oven to 375°.
2. Arrange pitas on a baking sheet. Bake at 375° for 14 minutes or until dry and crisp, turning after 7 minutes. Set aside; cool.
3. Combine lettuce and next 7 ingredients (through parsley) in a large bowl. Break pitas into bite-sized pieces. Add pitas to salad; toss gently to combine.
4. Combine juice, sugar, pepper, and salt in a bowl; gradually add oil, stirring constantly with a whisk. Drizzle dressing over salad; toss well to coat. Let stand 30 minutes; serve at room temperature.