Rinse the quinoa thoroughly using a fine mesh strainer. To cook, place 1 part quinoa to 2 parts water in a coking pot, and bring to boil. Cover and simmer on low for 15 minutes, or until the water is absorbed.
Heat the oil in a medium skillet, and add the onions, red pepper, and chopped celery. Sauté until translucent and remove from heat, then pour into a salad bowl.
Add the remaining ingredients, mixing well. For best results, wrap tightly and refrigerate overnight before eating for the flavors to absorb.