Spiced Yogurt Chicken Kebabs

Combine the yogurt, lemon juice, garlic, scallions, cilantro, coriander, cumin, ginger, allspice, turmeric (if using), chile flakes, salt, and pepper in a nonreactive dish or in a zip-top plastic bag. Toss the chicken in the marinade and allow it to marinate at room temperature for 20 minutes. (If you want to marinate it for longer--up to 6 hours is fine--refrigerate the chicken.)

Heat the broiler with the rack as close to the heat source as possible, or heat a gas grill, covered, to high. Thread the chicken pieces onto skewers.

Broil or grill the kebabs, turning once, until golden on both sides and cooked through but still succulent, about 10 minutes total. Serve immediately, with lemon wedges, if you like.