Bring quinoa, salt, and water to boil over high heat Cover and simmer over low heat for 10 minutes, until quinoa is tender Remove from heat and let stand for 5 minutes Fluff with fork While quinoa is cooking, chop garlic fine, or crush. Whisk together lemon juice and garlic. Gradually add olive oil, continuing to whisk Add a little salt and pepper Set aside until the quinoa has a little time to cool Add the dressing to the quinoa and mix well Chop cucumber, tomatoes, herbs, and scallions Toss together with quinoa Serve immediately or after chilling in refrigerator