Sumac is a distinctive spice made by grinding the dry, mature berries of the shrub known as "Rhus coriaria". Its intense tart flavor resembles lemon and vinegar, making it a versatile ingredient. Commonly sprinkled on various dishes such as meats, fish, and rice, it adds a special refreshing touch. It's also crucial in making za'atar and can be used to prepare delicious vinaigrettes complementing salads and vegetables. Originating from Lebanon, it possesses a unique character that enhances diverse Mediterranean recipes.