Bring a small pot of the vegetable broth to a simmer.
Remove from heat, stir in the couscous, then cover for 5 minutes.
Remove the lid then fluff with a fork.
Gently fold in the chickpeas.
Meanwhile, in a medium-large bowl, whisk the olive oil, lemon zest, lemon juice, fresh parsley, fresh mint, dried dill, dried oregano, black pepper, red pepper flakes, and salt to combine.
Fold the couscous and chickpea mixture into the dressing, along with the cucumber.
Taste, then adjust the herbs and spices if you like.
Garnish with more cucumber.