Summer green beans are here! Perhaps other beans, too, so substitute any of the three beans with what you can get on sale or from your garden... or the neighbors'. Canned garbanzos, pintos, or black beans are fine, too, in this beautiful and delicious summer salad that works as a side dish or protein-filled vegetarian entrée. Quinoa is a light, whole grain with plenty of protein itself; once you try it, you'll invite it back to your table again and again.
Rinse the quinoa under cold running water and drain. Bring 1 ¾ cups water to a boil in a small pot. Stir the quinoa and pinch of salt into water. Reduce the heat, cover, and simmer until tender and liquid is absorbed, 15-20 minutes. Uncover and let cool.
Put the cooled quinoa, green beans, edamame, peppers, kidney beans, dressing, and tarragon into a large bowl. Season with salt and pepper, to taste, and toss well. Serve chilled or at room temperature.