Rinse the quinoa well in a sieve under cool running water In a saucepan, bring the water to a boil, add the quinoa, cover, and simmer on low heat, until all of the water is absorbed and the quinoa is tender, about 10 to 15 minutes. Allow to cool for 15 minutes. In a small bowl, combine the oil, lime juice, cumin, coriander, cilantro and scallions. Stir in the beans, tomatoes, bell peppers and chiles. Add the cooled quinoa, and salt and pepper to taste, and combine thoroughly. Refrigerate until ready to serve. Garnish with lemon or lime wedges.