Prepare charcoal grill for direct-heat cooking. Remove cooking rack from grill and spray with non-stick cooking spray.

In medium bowl combine turkey, olives, parsley, garlic, cinnamon, nutmeg, salt and pepper. Evenly distribute mixture into four burgers (approximately 4 1/2-inches in diameter.

Grill burgers 2 to 3 minutes per side until meat thermometer registers 160º to 165º, and meat is no longer pink in center.

To serve, spread 1 tablespoon sour cream on pita. Place cooked burger on bottom half of pita and top evenly with cucumber and 1 tablespoon Feta cheese. Fold over top half of pita and serve.