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+ servings
sumac onions in bowl 3

Marinated Sumac Onions (Red Onion Salad)

Chloe from Forkful of Plants
Prep Time 5 mins
Marinating Time 30 mins
Total Time 35 mins
Course Condiment, Side Dish
Cuisine Mediterranean
Servings 4
Fancy a bit of a different condiment for your dinner table? Marinated sumac onions are made by massaging tart, lemony sumac into crisp red onions. Often called red onion salad, it's the ideal pickle to have ready to go in the fridge. Perfect with salad bowls, BBQ’s, sandwiches, falafels and dips. 
5 from 2 votes


  • 1 large red onion thinly sliced
  • 2 tsp sumac
  • ½ tsp salt
  • 2 tbsp red wine vinegar
  • 2 tbsp olive oil


  • Add the thinly sliced onions to a bowl with the sumac and salt. Gently massage them for a minute until they are well combined.
  • Add the red wine vinegar and oil, stir well, and leave to marinate for 30 minutes.
  • Keep in a sealed container in the fridge, and enjoy for up to 2 weeks.


If you’d like to spruce up your onion salad, mix the red onion salad with some fresh chopped parsley. This is a very common way to serve sumac onions, as the fresh lemony flavour of parsley goes so well with the punchy flavour of the dish. 
If you find that raw onion is too strong for you, even in sumac pickled onions, you can soak the raw onion slices in hot water for 10-30 minutes before mixing them with the other ingredients. This will reduce the strong onion flavour and make them more palatable. If you do this, make sure you pat them dry before carrying on with the recipe.
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