Peel and dice the cucumbers.

Dice the green pepper.

Chop the green onions.

Cube the tomatoes.

Chop the lettuce.

Mince the mint.

Combine the diced cucumbers, green pepper, chopped green onions, cubed tomatoes, chopped lettuce, and minced mint in a large bowl.

In a separate bowl, whisk together the olive oil, lemon juice, salt, and sumac to create a vinaigrette.

Pour the vinaigrette over the vegetables.

Mix well to coat the vegetables evenly with the dressing.

Chill the salad in the refrigerator for at least one hour to allow the flavors to meld.

Just before serving, add the croutons or crisp toasted Lebanese bread.

Toss lightly to combine.

Serve immediately.