Preheat oven to 400°F (200°C).
Place the pita bread pieces on a baking sheet and bake until crispy, about 5 minutes.
In a large bowl, combine cherry tomatoes, cucumber, lettuce, red onion, mint leaves, and parsley.
In a small bowl, whisk together olive oil, lemon juice, sumac, salt, and pepper to make the dressing.
Pour the dressing over the salad and toss to combine.
Add the crispy pita pieces and gently toss again.
Serve immediately and enjoy your refreshing Fattoush Salad!