Chicken shawarma is an iconic street food, known for its deep, spiced flavors and tender, juicy meat. While traditional shawarma is cooked on a vertical spit, this version simplifies the process, using marinated chicken thighs roasted in the oven.
Marinate the Chicken: In a large bowl, whisk together the olive oil, lemon juice, minced garlic, cumin, coriander, turmeric, cinnamon, cayenne, and kosher salt. Add the chicken thighs and toss to coat. Cover the bowl and refrigerate for at least 2 hours or up to overnight.
Roast the Chicken: Preheat your oven to 425°F (220°C) and lightly grease a large baking sheet with cooking spray. Add the sliced onion to the marinade and toss it to coat. Remove the chicken and onion from the marinade and place them on the prepared baking sheet. Bake for 30 minutes, or until the chicken is golden and cooked through (internal temperature should reach 165°F). Let the chicken rest for 5 minutes, then thinly slice.
Prepare the Yogurt Sauce: While the chicken is roasting, make the yogurt sauce by whisking together the Greek yogurt, lemon juice, olive oil, minced garlic, kosher salt, and red pepper flakes in a small bowl. Adjust the seasoning to taste.
Assemble the Shawarma: Warm the pitas in the oven for a few minutes. To serve, place sliced chicken and onions on the pitas, then add chopped romaine, halved cherry tomatoes, cucumber slices, and a drizzle of the yogurt sauce.