Place the scallions, tomatoes, cucumber, chickpeas, parsley, mint, and basil in a large salad bowl and toss to combine.
In a small bowl or measuring cup, whisk together the lemon juice, garlic, 2 teaspoons salt, and 1 teaspoon pepper. Slowly whisk in the olive oil to make an emulsion. Pour the dressing over the salad, tossing gently to coat all the vegetables. Add the feta, sprinkle with salt and pepper, and toss gently. Serve the salad with the toasted pita bread.