Rinse the quinoa under cold water in a fine mesh strainer to remove any bitterness.
In a medium saucepan, bring the vegetable broth 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 fluffy and the liquid is absorbed.
Remove the quinoa from heat and let it cool for a few minutes. Fluff it with a fork and set aside to cool completely.
In a large mixing bowl, combine the cooled quinoa, cherry tomatoes, cucumber, red bell pepper, red onion, Kalamata olives, feta cheese, and parsley.
In a small bowl, whisk together the olive oil, lemon juice, dried oregano, salt, and pepper until well combined.
Pour the dressing over the quinoa salad and gently toss until everything is evenly coated.
Taste and adjust the seasoning if needed, adding more salt, pepper, or lemon juice to your preference.
Let the salad sit for at least 15 minutes before serving to allow the flavors to meld.
Notes
Serve chilled or at room temperature. Garnish with extra parsley or lemon wedges.