Rinse quinoa in a very find mesh strainer. Combine quinoa, water and 1 teaspoon salt in a medium saucepan. Bring to a boil over high heat. Reduce heat to low and simmer, covered for 30 minutes. Remove from heat and let stand, covered for 15 minutes. Fluff with a fork and place in a shallow pan to cool. Combine cooled quinoa, black beans, corn, tomatoes, onions, peppers and cilantro. In a separate small bowl whisk together dressing ingredients and remaining salt. Pour over quinoa mixture; gently fold together. Serve with warm flour tortillas.