Prepare the couscous by bringing vegetable broth to a boil.
Add couscous to the broth, then cover and remove from heat.
Fluff the cooked couscous with a fork and let it cool.
In a large bowl, combine cherry tomatoes, cucumber, bell pepper, red onion, olives, parsley, and feta cheese.
In a small bowl, whisk together olive oil, lemon juice, salt, and pepper.
Add the cooled couscous to the vegetable mixture.
Pour the dressing over the salad and toss gently.
Taste and adjust seasoning if necessary.
Serve immediately or chill for an hour before serving.