Preheat your oven to 180°C (350°F).

Place the pita bread rounds on a baking sheet and brush them with a little olive oil. Bake in the preheated oven for about 5-7 minutes until they become crispy. Remove from the oven and let them cool.

Break the cooled pita bread into small pieces or cut them into bite-sized squares.

In a large mixing bowl, combine the chopped romaine lettuce, cucumber, tomatoes, red onion, parsley, mint leaves, sliced radishes, and sliced green bell pepper (if using).

In a small bowl, whisk together the olive oil, lemon juice, minced garlic, sumac (if using), salt, and pepper to make the dressing.

Pour the dressing over the salad ingredients in the mixing bowl and toss gently to coat the salad with the dressing.

Add the broken or cut pita bread pieces to the salad and toss again.

Let the Fattoush salad sit for a few minutes to allow the flavors to meld together.

Serve the Fattoush salad immediately as a refreshing and tangy appetizer or side dish.