Quinoa, Beet, and Arugula Salad

Place a steamer insert into a saucepan, and fill with water to just below the bottom of the steamer. Cover pan and bring the water to a boil. Add beets, cover pan, and steam until just tender, 7 to 10 minutes. Set aside.
Bring quinoa and 2 cups water a saucepan over high heat. Reduce the heat to medium-low, cover, and simmer until the quinoa is tender and the liquid has been absorbed, about 15 minutes.
While the quinoa is cooking, whisk olive oil, red wine vinegar, sugar, garlic, salt, and black pepper together in a large bowl.
Remove quinoa from heat, then immediately add half of the vinegar dressing while fluffing the quinoa with a fork; reserve remaining dressing. Cover and refrigerate quinoa until cool, at least 1 hour.
Stir green onions, arugula, goat cheese, beets, and remaining dressing into cooled quinoa mixture. Toss lightly before serving.