In a medium saucepan, combine the rinsed quinoa and water. Bring to a boil over medium-high heat, then reduce the heat to low, cover, and simmer for about 15 minutes or until the quinoa is fluffy and the water is absorbed. Remove from heat and let it cool slightly.
In a large mixing bowl, combine the black beans, cherry tomatoes, corn, bell pepper, red onion, and cilantro.
In a small bowl, whisk together the olive oil, lime juice, cumin, salt, and pepper.
Add the cooked quinoa to the large mixing bowl with the vegetables. Pour the dressing over the salad and toss gently to combine.
Taste and adjust seasoning if necessary. Serve immediately or chill in the refrigerator for at least 30 minutes to allow flavors to meld.