Marinate the Chicken
Mix: In a large bowl, whisk together the yogurt, tomato paste, lemon juice, oil, and the Doner Spice Mix until smooth.
Coat: Toss the thin chicken fillets in the marinade until fully covered.
Rest: Cover and refrigerate for at least 1 hour to tenderize the meat.
Sear and Stack
Sear: Heat a non-stick skillet over medium-high heat. Cook the fillets in batches until they develop a dark, charred crust on both sides.
Stack: Place the cooked fillets on top of each other to create a dense pile.
Secure: Insert two wooden skewers through the center of the stack to hold the layers together.
The "Doner" Shave
Slice: Using a very sharp knife, shave the sides of the chicken stack vertically. This creates the signature thin, crispy-edged strips found in professional kebab shops.
Prepare the Sauce
Whisk: Combine all white sauce ingredients in a small bowl until creamy. Adjust salt to taste.
Assemble the Wrap
Warm: Lightly heat the tortillas or pitas.
Layer: Spread a dollop of white sauce, followed by a bed of lettuce and the fresh vegetable salad.
Fill: Add a generous portion of the shaved chicken and a final drizzle of sauce. Roll tightly and serve.