
Mix the salad. In a large salad or mixing bowl, gently toss together the tomatoes, onion, garlic, parsley, and dill.
Dress the salad. Add the sumac and season with salt and pepper to taste. Add the lemon juice, white wine vinegar, and extra virgin olive oil. Toss to combine. Taste and adjust the seasoning to your liking.
Serve. Transfer to a serving platter or bowl. Top with large pieces of quality feta cheese. Enjoy!