Rinse the quinoa under cold water to remove any bitter-tasting saponins.
In a saucepan, combine the rinsed quinoa with 3 cups of water. Bring to a boil, then reduce the heat to low, cover, and simmer for 15-20 minutes, or until the quinoa is tender and has absorbed the water. Remove from heat and let it sit, covered, for a few minutes. Fluff the quinoa with a fork and let it cool to room temperature.
In a large mixing bowl, combine the cooked quinoa, chopped spinach, pomegranate seeds, and chopped mint leaves.
In a small bowl, whisk together the olive oil, lemon juice, salt, and black pepper until well combined.
Pour the dressing over the salad and toss gently to combine, ensuring all ingredients are evenly coated.
Taste and adjust seasoning if needed.
Serve chilled or at room temperature. Enjoy!