In a medium pot, combine the rinsed quinoa and vegetable broth (or water). Bring it to a boil over medium heat. Once boiling, reduce the heat to low, cover, and let simmer for 15 minutes or until all the liquid is absorbed. Remove from heat and let it sit covered for an additional 5 minutes. Fluff with a fork and let cool.
In a large mixing bowl, combine the halved cherry tomatoes, diced cucumber, diced bell pepper, red onion, parsley, and crumbled feta cheese (if using).
In a separate small bowl, whisk together the olive oil, lemon juice, minced garlic, salt, and pepper to create the dressing.
Add the cooled quinoa to the vegetable mixture in the large bowl. Pour the dressing over the top and toss gently to combine, ensuring everything is well coated.
Taste and adjust seasoning with additional salt, pepper, or lemon juice as desired.
Serve immediately or refrigerate for 30 minutes to allow the flavors to meld together before serving.
Notes
Serve the salad in a large serving bowl, garnished with a few extra parsley leaves and slices of lemon for a fresh touch.