For the barley, bring the barley, broth, and water to a low boil in a medium pot. Cover, reduce to a simmer and cook for about 25 minutes, or until the grains are tender but still have some bite. If there is extra liquid, remove the lid and allow some liquid to evaporate before serving.
Fold in the lemon zest and juice, 1 tablespoon parsley, dill, oregano, red pepper flakes, black pepper, and salt, to taste.
Spoon the seasoned barley into two bowls.
Top with chickpeas, cucumber, tomato, lettuce, feta, olive oil, and the remaining parsley. Season with salt.