Bring quinoa and water to a boil in a saucepan. Reduce heat to medium-low, cover and simmer until quinoa is tender and water has been absorbed (10-15 minutes). Set aside to cool.
Whisk olive oil, lime juice, cumin, 1 teaspoon salt, and red pepper flakes together in a bowl. We added a bit of M & M Minced Garlic to our dressing (1 to 1 1/2 tsp ).
Combine quinoa, tomatoes, black beans and green onions together in a bowl. Pour dressing over quinoa mixture; toss to coat. Stir in cilantro; season with salt and black pepper. Serve immediately or chill in refridgerator.