Shirazi salad is known for its fine, uniform dice. The closer you can get to 1/4-inch dice on the veggies the better. Look for ab ghooreh (sour grape juice) at Middle Eastern markets.
Stir together tomatoes, cucumbers, red onion, parsley, mint, ab ghooreh, oil, salt, and pepper in a large serving bowl. Season to taste. Garnish with parsley and serve immediately with lemon wedges.
