1. In a saucepan, bring the quinoa and water to a boil. Reduce heat to low, cover, and simmer for 15 minutes or until the water is absorbed and the quinoa is tender.
2. Fluff the quinoa with a fork and let it cool to room temperature.
3. In a large mixing bowl, combine the cooked quinoa, cherry tomatoes, mozzarella balls, and basil leaves.
4. Drizzle with olive oil and balsamic vinegar. Season with salt and pepper to taste. Toss to combine.