In a large bowl, toss together the onions, sumac, paprika, and salt. Massage onions with hands to rub the spices and salt into the onions, and let sit about 5 minutes. Drain any excess liquid from bottom of the bowl.
Add in the garbanzo beans, parsley, and mint, and toss to combine.
In a small bowl, whisk together the olive oil, lemon juice, and garlic. Pour over salad and toss to coat. Season with salt and pepper to taste.
Notes
The entire recipe makes 6 servingsThe serving size is about 1 heaping cup