This Red Onion Salad features thinly sliced red onions, parsley, and a zesty sumac-based marinade.

What you need to make Marinated Sumac Onions.

Start by peeling and slicing the red onion. Add to a bowl, along with the chopped parsley.

Whisk lemon juice, vinegar, olive oil, sumac, salt, and sugar in a small bowl.

Pour the dressing over the onions and parsley, then mix thoroughly to combine.

Allow the flavors to come together for an hour or so before using.