Sumac is deep red to purple in color and is used to add a zesty, lemony taste.
Sumac is a regular inclusion in Middle Eastern cuisine used on meats, in dips and salads, rice in Turkish cuisine and in Za'atar mix.
Here are some example recipes using Sumac powder:
Fresh salad with bread wedges
Lebanese meat and tomato pie smacks
Open spicy pies with minced lamb, tomato and pine nuts
Pita zaatar bread
Pizza with sumac, sesame, thyme, marjoram and oregano topping