Prep & Shred the Chicken: Place the shredded chicken in a medium bowl and set aside.
Toast the Spices: Heat the olive oil in a small skillet over medium heat. Add the oregano, coriander, cumin, turmeric, smoked paprika, and allspice (if using). Toast the spices for about 30 seconds, or until fragrant, being careful not to burn them.
Coat the Chicken with Spices: Transfer the toasted spices to a small bowl and whisk in the mashed roasted garlic and lemon juice. Pour the spice mixture over the chicken and toss to coat evenly. Taste and adjust the salt as needed. Set aside.
Make the Lemon Garlic Sauce: In a separate bowl, whisk together the yogurt, olive oil, mashed roasted garlic, lemon juice, honey, salt, and pepper to make the sauce. Adjust seasoning if necessary and refrigerate until ready to use.
Assemble the Salad: Chop the iceberg lettuce into bite-sized pieces and arrange it on a large serving platter or individual plates. Top with the spiced chicken, cherry tomatoes, red onion, and cucumbers (if using).Drizzle the lemon garlic yogurt sauce generously over the salad and sprinkle crushed pita chips on top, if desired. Add a final grind of black pepper to finish. Serve immediately and enjoy!