Lamb Kebabs with Herbed Yogurt Ingredients 3 tablespoons sumac 4 teaspoons ground cumin 4 teaspoons ground coriander 2 tablespoons ground Aleppo pepper 2 pounds ground lamb (85 percent lean) 1 white onion, finely chopped (1 1/2 cups) 1 tablespoon minced garlic (from 3 cloves) 2 tablespoons finely chopped [...]