
The vibrant mix of sumac-infused red onions creates a lively, cool salad through a basic but wonder-working prep method. This classic Turkish offering turns ordinary onions into a tangy topping that adds life to any meal with its ideal mix of lemony sumac, garden-fresh herbs, and soft onions. Every mouthful gives you an explosion of taste that turns this into much more than onion salad - it's a must-have companion for your mezze table or barbecue dinner.
I first tasted this while wandering around Istanbul and have made it tons of times since. What really won me over was seeing my daughter, who usually avoids spicy stuff, go back for more and say these onions were 'really tasty!'
Key Components and Shopping Advice
- Red Onions: Go for solid, weighty ones with snug, glossy skin for top results. Red onions offer gorgeous color and just the right mix of sweet and sharp.
- Sumac: Try to find fresh, vivid wine-colored sumac with a citrusy aroma. You'll usually get the most aromatic kinds at Middle Eastern stores.
- Fresh Parsley: Pick flat-leaf parsley with bright green leaves and firm stems. Its bold taste works perfectly against the onions.
- Extra Virgin Olive Oil: Grab a good quality olive oil with a sweet, gentle taste for the best outcome.

Step-by-Step Cooking Guide
- Onion Preparation:
- Grab a sharp knife or mandoline to cut onions super thin, so they soak up flavor evenly. Slice with the grain for the prettiest look.
- Sumac Massage:
- Dust sliced onions well with sumac and a tiny bit of salt. Rub softly for 2-3 minutes to soften them up and let the flavor sink in.
- Resting Period:
- Set the onions aside for 10-15 minutes. They'll release their juices and get a nice tender feel during this time.
- Final Seasoning:
- Pour olive oil and fresh lemon juice over onions, then mix softly to cover everything. Toss in freshly cut parsley right before you serve.
Once during a hot night, I watched as my Turkish friend made this salad for her family get-together. She taught me that onions should be just see-through enough to read through - now that's how I always check if I've cut them right.
Smart Cooking Tricks
- Drop onion slices in icy water for 10 minutes before adding seasoning to cut down on their bite while keeping them crisp.
- Try mixing in other fresh herbs like mint for a cool feeling or dill for more aroma.
- Don't throw away the onion juice that gathers at the bowl bottom - it works great in salad dressings.
This sumac onion mix shows how careful handling can turn basic stuff into something amazing. Whether it's part of your mezze spread or topping your grilled meats, this dish brings strong, fresh flavors that wake up your taste buds and make any meal extra special.

Frequently Asked Questions
- → What exactly is sumac and can I buy it anywhere?
- Sumac is a bright and tangy spice made from dried berries, typically found in Middle Eastern shops or larger grocery stores with diverse spice sections.
- → How long do these onions stay good in the fridge?
- You can keep them in a sealed container in the fridge for up to 4 days. Just drain extra liquid before serving.
- → Why do you rub the onions with sumac?
- Rubbing softens the onions while infusing them with the sumac's unique tangy taste.
- → How do I make the taste less sharp?
- For a milder kick, soak the sliced onions in cold water for about 10 minutes before mixing with the spices.
- → What meals work well with sumac onions?
- They’re fantastic with grilled dishes, falafel, dips, sandwiches, salads, or any hearty Middle Eastern meal.