In a large bowl, combine olive oil, cumin, smoked paprika, turmeric, ground coriander, Kosher salt, black pepper, minced garlic, and lemon juice. Stir well to create a flavorful marinade. Add the cut chicken pieces to the bowl, ensuring they are well-coated. Cover and let marinate for at least 15 minutes (or up to 2 hours for deeper flavor).
Heat a large skillet over medium-high heat. Once hot, add the marinated chicken pieces in a single layer. Cook for about 6-8 minutes, stirring occasionally, until the chicken is browned and fully cooked through. If necessary, add olive oil to the skillet to prevent sticking.
While the chicken is cooking, prepare your salad ingredients. In a large bowl, combine the diced tomatoes, diced English cucumber, optional red onions, and chickpeas. Toss gently to combine and season with additional salt and pepper if desired.
In a separate bowl, whisk together Greek yogurt, lemon juice, minced garlic (if using), cumin, ground coriander, Kosher salt, black pepper, and granulated sugar (if desired). Adjust the seasoning to taste for a creamy and zesty dressing.
To assemble the salad bowls, divide the salad mixture among serving bowls. Top each with a generous portion of the cooked chicken. Drizzle with the yogurt dressing and sprinkle with fresh parsley for added flavor.