01 - In a medium saucepan, bring water to a boil. Add quinoa, reduce heat, cover, and simmer for 15 minutes until water is absorbed. Fluff with a fork and let cool slightly.
02 - While the quinoa cooks, halve the cherry tomatoes, dice the cucumber, thinly slice the red onion, and chop the fresh parsley.
03 - In a small bowl, whisk together olive oil, lemon juice, oregano, salt, and pepper until well combined.
04 - Divide the cooked quinoa among 4 bowls. Top each bowl with spinach or arugula, tomatoes, cucumber, red onion, parsley, olives, and feta cheese if using.
05 - Add a generous scoop of hummus to each bowl and drizzle with the dressing.
06 - Serve immediately or refrigerate for up to 2 days for a make-ahead meal.