These tasty, easy-to-make Greek-style sandwiches are perfect to serve at lunch or dinner.
Special Extra: Sprinkle 1 Tbsp. chopped black olives over each topped flatbread before folding as directed.How to Warm the Flatbreads: Heat oven to 350°F. Wrap bread in foil. Bake 5 to 7 min. or until heated through. Or grill 1 to 2 min. or until grill-marked but still soft, turning frequently.Easy Cleanup: Marinate the chicken in a resealable plastic bag instead of in the glass dish. Discard bag after use.
Pour vinaigrette over chicken in shallow dish; turn to evenly coat both sides of each chicken breast. Refrigerate 2 hours to marinate, turning chicken after 1 hour.
Heat greased barbecue to medium-high heat. Remove chicken from marinade; discard marinade. Grill chicken 6 to 8 min. on each side or until done (165°F). Cool completely.
Warm flatbreads. Chop chicken. Place each flatbread on separate sheet of parchment or foil; spread with dressing. Top with chicken and remaining ingredients. Use parchment to fold in opposite sides of each flatbread, then fold up bottom of paper to enclose filling and avoid dripping.