Rinse quinoa under cold water using a fine-mesh sieve to remove bitter saponin residue.
In a medium saucepan, combine quinoa and water or vegetable broth. Bring to a boil, then reduce heat to low, cover, and simmer for 15 minutes or until quinoa is tender and water is absorbed.
Remove from heat and let quinoa cool to room temperature.
In a large bowl, combine cooked quinoa, diced cucumber, diced bell pepper, finely chopped red onion, halved cherry tomatoes, chopped fresh parsley, and chopped fresh cilantro.
In a small bowl, whisk together olive oil, lemon juice, ground cumin, salt, and black pepper.
Pour the dressing over the quinoa salad and toss gently until everything is well combined and coated with the dressing.
Adjust seasoning if needed.
Serve chilled or at room temperature. Enjoy your delicious and nutritious quinoa salad!