In a medium bowl, whisk together olive oil, lemon juice, minced garlic, dried oregano, ground cumin, paprika, ground cinnamon, salt and pepper to create the marinade.

Slice chicken breasts into thin strips and place in a resealable bag or bowl. Pour the marinade over the chicken, seal, and refrigerate for at least 1 hour.

Heat a large skillet over medium-high heat. Add marinated chicken pieces and cook for 5–7 minutes on each side until golden-brown and cooked through.

Warm pita bread in the skillet or wrap in foil and heat in a preheated oven at 350°F for 5-10 minutes.

Spread tzatziki sauce on warm pita, layer cooked chicken and toppings like sliced red onion, cucumber, and tomato.

Roll the pita tightly around the filling, cut in half if desired, and serve immediately.