In a large bowl, combine the ground chicken, grated onion, garlic, parsley, mint, breadcrumbs, egg, olive oil, and spices. Mix everything gently until fully combined. Avoid overmixing because it can make the kafta dense.
Cover the bowl and refrigerate the mixture for about 15 minutes. Chilling helps the ingredients bind together and makes shaping easier. This step also improves the final texture.
Lightly wet your hands and divide the mixture evenly. Form long oval shapes around skewers, pressing firmly so they hold together. Keep the thickness consistent for even cooking.
Heat your grill or grill pan over medium-high heat. Lightly oil the grates to prevent sticking. A properly heated grill helps create beautiful char marks.
Place the skewers on the grill and cook for about 6–8 minutes per side. Turn carefully until the chicken is fully cooked and lightly charred. The internal temperature should reach 165°F (74°C).
Combine the lettuce, tomatoes, cucumber, radishes, green onions, and parsley in a large bowl. Add the toasted pita pieces just before serving. This keeps them crunchy and fresh.
Whisk together lemon juice, olive oil, sumac, salt, and pepper. Pour the dressing over the vegetables and toss gently. The dressing should lightly coat every ingredient.
In a small bowl, mix tahini, lemon juice, garlic, and salt. Gradually add water until the sauce becomes smooth and pourable. Stir continuously to prevent lumps.
Arrange the grilled chicken kafta on a serving platter. Add the fattoush salad alongside and drizzle with tahini sauce. Serve immediately for the freshest flavor.