In a medium saucepan, combine the rinsed quinoa with vegetable broth (or water). Bring the mixture to a rapid boil over high heat.
Once boiling, reduce the heat to low, cover the pot with a lid, and let it simmer for 15-20 minutes, or until the quinoa is fluffy and all the liquid has been absorbed. Remove from heat and keep covered to let it steam for an additional 5 minutes.
After the quinoa has rested, use a fork to fluff it gently, then transfer it to a large mixing bowl. Allow it to cool to room temperature.
While the quinoa cools, prepare the vegetables: in a small mixing bowl, combine the halved cherry tomatoes, diced cucumber, finely chopped red onion, parsley, mint, and feta cheese (if using). Mix gently to combine.
In a separate bowl, whisk together the olive oil, lemon juice, lemon zest, salt, and pepper until well combined. This will serve as your zesty dressing.
Once the quinoa has cooled down, add the vegetable mixture to the bowl with the quinoa. Drizzle the dressing over the salad and gently toss everything together until well mixed. Taste and adjust the seasoning with more salt and pepper if needed.
For best results, chill the quinoa salad in the refrigerator for at least 30 minutes before serving. This allows the flavors to meld beautifully.
Notes
Chill the salad for at least 30 minutes before serving for best flavor.