In a medium saucepan, bring the vegetable broth (or water) to a boil. Add the rinsed quinoa, reduce the heat to low, cover, and let it simmer for about 15 minutes, or until the quinoa is cooked and the liquid is absorbed. Fluff with a fork and let it cool.
In a large mixing bowl, combine the cooled quinoa, cherry tomatoes, cucumber, bell pepper, red onion, feta cheese, olives, and parsley.
In a small bowl, whisk together olive oil, lemon juice, dried oregano, salt, and pepper until well combined.
Pour the dressing over the quinoa mixture and gently toss until everything is coated evenly.
Taste and adjust seasoning or add more lemon juice if desired.
Let the salad rest for 30 minutes at room temperature to allow flavors to meld. Serve chilled or at room temperature.
Notes
Let the salad rest for 30 minutes to enhance the flavors.