Rinse the quinoa under cold water in a fine-mesh strainer to remove any bitterness.
In a large pot, bring 2 cups of water to a boil. Add the rinsed quinoa and a pinch of salt. Reduce the heat to low, cover, and let it simmer for about 15 minutes, until the water is absorbed and the quinoa is fluffy.
Once cooked, remove the quinoa from heat and allow it to cool. Fluff it with a fork to separate the grains.
While the quinoa cools, prepare your vegetables and herbs by finely chopping the parsley, mint, cherry tomatoes, cucumber, and red onion.
In a large bowl, combine the cooled quinoa, chopped parsley, mint, tomatoes, cucumber, and red onion.
In a separate bowl, whisk together the lemon juice, olive oil, salt, and pepper to create a zesty dressing.
Pour the dressing over the quinoa and vegetable mixture. Gently toss everything together until well combined and coated with the dressing.
Taste and adjust the seasoning with more salt or pepper if needed.
Serve chilled or at room temperature, and enjoy your Zesty Quinoa Tabbouleh!