1Rinse the quinoa under cold water to remove its natural coating, saponin, which can make it taste bitter.
In a medium saucepan, combine the rinsed quinoa and water. Bring to a boil over medium-high heat.
Once boiling, reduce the heat to low, cover, and simmer for about 15 minutes, or until the quinoa is cooked and water is absorbed.
Remove from heat and let it stand for 5 minutes, covered. Fluff with a fork and allow to cool slightly.
While the quinoa is cooking, prepare the vegetables: dice the cucumber, halve the cherry tomatoes, and chop the red onion.
In a large bowl, combine the cooked quinoa, diced cucumber, halved cherry tomatoes, halved kalamata olives, and finely chopped red onion.
Crumble the feta cheese over the mixture.
In a small bowl, whisk together the olive oil, lemon juice, and dried oregano to create the dressing.
Pour the dressing over the quinoa and vegetable mixture and toss to combine.
Serve the Mediterranean Quinoa Bowl immediately, or chill in the refrigerator before serving.