Chicken Shawarma with Yogurt Sauce

Combine 1/4 cup yogurt, onion, 1 tablespoon lemon juice, 2 garlic cloves, coriander, cumin, allspice, pepper, 3/4 teaspoon salt and turmeric in a large bowl. Add chicken and rub the yogurt mixture into it. Cover and refrigerate for 1 hour or up to 3 hours.