Mix this versatile Middle Eastern spice blend with olive oil (1/4 cup Za'atar to 1/2 cup oil) for a zesty dipping sauce for breads. Use it as a rub for roast poultry, or stir into rice or couscous. Za'atar enlivens plain yogurt drizzled with olive oil for a tasty vegetable dip. Check Mediterranean grocery stores for tart ground sumac, the characteristic spice of Za'atar.