How to Make It
Heat oven to 350° F. Place the pita halves cut-side up on a baking sheet, brush with 1 tablespoon of the oil, and bake until golden and crisp, 4 to 6 minutes. Let cool, then break into pieces.
Whisk together the vinegar, oregano, the remaining 3 tablespoons of oil, ½ teaspoon salt, and ¼ teaspoon black pepper in a large bowl.
Add the lettuce, tomatoes, bell pepper, cucumber, onion, chickpeas, Feta, pita chips, and pepperoncini and olives, if desired, and toss to combine.