Step 1

In a medium saucepan, bring 4 cups of the water to a boil over high heat. Add the lentils and reduce the heat to medium low, allowing the lentils to simmer, until tender, but not mushy, about 30 minutes. Drain and let them cool completely.

Step 2

While the lentils are cooking, prepare the quinoa. In another medium saucepan combine the remaining 2 cups water and quinoa. Bring to a boil over medium high heat. Reduce the temperature to low, cover the pan and simmer gently for 15 to 20 minutes, or until all the water is absorbed. Remove the pan from the heat and cool completely.

Step 3

Make the dressing: in a small bowl, whisk together the tarragon, salt, pepper, lemon zest, lemon juice, olive oil and mustard.

Step 4

When the lentils and quinoa are completely cool, in a large bowl combine them with the sliced green onions, tossing them gently together. Add the dressing and toss again gently until everything is coated.

Step 5

Cover and refrigerate for at least 1 hour, until chilled, or for up to 4 hours. Just before serving, stir in the chopped fresh parsley.