INGREDIENTS
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1 tablespoon olive oil, divided
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1 pound skinless, boneless chicken breast, thinly sliced
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1/2 teaspoon salt
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1/4 teaspoon freshly ground black pepper
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1 1/2 cups vertically sliced onion (about 1 medium)
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1 cup thinly sliced green bell pepper (about 1)
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2 teaspoons bottled minced garlic
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1/2 teaspoon dried oregano
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1/2 cup grated English cucumber
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1/4 cup 2% Greek-style yogurt (such as Fage)
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1/4 cup reduced-fat sour cream
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1 tablespoon chopped fresh flat-leaf parsley
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1/2 teaspoon grated lemon rind
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1 teaspoon fresh lemon juice
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1/8 teaspoon salt
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4 (6-inch) whole-wheat soft pitas, cut in half
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2 plum tomatoes, thinly sliced