01 - Rinse quinoa thoroughly under cold water. In a medium saucepan, combine quinoa and water. Bring to a boil, reduce heat to low, cover, and simmer for 12 to 15 minutes until tender and water is absorbed. Remove from heat, let stand covered for 5 minutes, then fluff with a fork and cool to room temperature.
02 - In a large bowl, mix the cooled quinoa with diced cucumber, cherry tomatoes, red onion, Kalamata olives, parsley, and mint if using.
03 - Whisk together olive oil, lemon juice, minced garlic, oregano, salt, and black pepper in a small bowl or jar until well blended.
04 - Pour the dressing over the salad mixture and toss gently to combine all ingredients evenly.
05 - Incorporate crumbled feta cheese, toss lightly, then taste and adjust seasoning as needed.
06 - Serve immediately or refrigerate for at least 30 minutes to enhance flavor melding.