Onion Salad With Sumac Ingredients 2 onions, thinly sliced 1/2 tsp ground sumac salt Method 1) put the onions in a bowl and sprinkle the sumac and the salt 2) leave to stand for 30 minutes before serving. Read also: Starters and Soups  Squid Salad with Spicy Garlic Sauce Cumin Tomato Salad  Garbanzo Salad