01 - Rinse quinoa thoroughly under cold water using a fine mesh strainer to remove bitter coating.
02 - In a medium saucepan, combine quinoa, water, and 1/2 teaspoon salt. Bring to a boil, reduce heat to low, cover, and simmer for 12–15 minutes until quinoa is tender and water is absorbed. Fluff with a fork and let cool completely.
03 - While quinoa cools, halve the cherry tomatoes, dice the cucumber, finely dice the red onion, and chop the fresh parsley and mint if using.
04 - In a large mixing bowl, combine cooled quinoa, cherry tomatoes, cucumber, red onion, parsley, mint (if using), Kalamata olives, and crumbled feta cheese.
05 - In a small bowl, whisk together extra virgin olive oil, fresh lemon juice, dried oregano, black pepper, and salt to taste until emulsified.
06 - Pour the dressing over the salad and toss gently to coat all ingredients evenly. Taste and adjust seasoning as needed. Serve chilled or at room temperature.