Combined the Apple Cider Vinegar, zest, juice, sugar and oil together. Really whisk this good. Set aside!
In a large bowl combine the quinoa, beans, corn, and onion.
Gently fold in the Mandarin Oranges to the quinoa mixture.
Drizzle the dressing over the top of the quinoa mixture. Fold in the dressing, cover with plastic wrap and refrigerate for 2 hours to allow the ingredients to marry.