Slice the Onion: Thinly slice the red onion and place it in a bowl.
Add Seasoning: Sprinkle the sumac, salt, lemon juice, chopped parsley and olive oil over the onions.
Mix Well: Toss everything together until the onions are evenly coated with the seasoning.
Let it Rest: Allow the onions to sit for 10–15 minutes to soften and absorb the flavors.
Serve: Use as a topping for grilled meats, salads, wraps, or falafel.
Video
Notes
Quick Tip: If the onions taste too sharp, soak them in cold water for 10 minutes before adding the seasonings.Best White Onion for Sumac Onions: Sweet White Onions (e.g., Vidalia or Maui Onions): These are the best choice if you're using white onions. They have a milder, sweeter flavor, which balances beautifully with the tanginess of the sumac and lemon juice. Why Sweet White Onions Work Best: Their natural sweetness mellows out the sharpness of raw onions. They absorb flavors from the sumac and lemon juice more effectively without overpowering the dish. Other Options (If Sweet White Onions Aren’t Available): Standard White Onions: These are sharper and more pungent but can still work. Soak them in cold water for 10–15 minutes before seasoning to reduce the bite. Spanish White Onions: Slightly milder than regular white onions, these are also a solid choice.Quick Tip: If using sharp white onions, adding an extra drizzle of olive oil and a pinch of sugar can help balance out their stronger flavor.