Ingredients

• Souvlaki Marinade:
• 3/4 cup balsamic vinaigrette salad dressing
• 3 tablespoons lemon juice
• 1 tablespoon dried oregano
• 1/2 teaspoon freshly ground black pepper
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• 4 skinless, boneless chicken breast halves
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• Tzatziki Sauce (cucumber sauce):
• 1/2 cup seeded, shredded cucumber
• 1 teaspoon kosher salt
• 1 cup plain yogurt
• 1/4 cup sour cream
• 1 tablespoon lemon juice
• 1/2 tablespoon rice vinegar
• 1 teaspoon olive oil
• 1 clove garlic, minced
• 1 tablespoon chopped fresh dill
• 1/2 teaspoon Greek seasoning
• kosher salt to taste
• freshly ground black pepper to taste
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• 4 large pita bread rounds
• 1 heart of romaine lettuce, cut into 1/4 inch slices
• 1 red onion, thinly sliced
• 1 tomato, halved and sliced
• 1/2 cup kalamata olives
• 1/2 cup pepperoncini
• 1 cup crumbled feta cheese