Cook the quinoa ahead of time. The quinoa can be cooked several days ahead of time and stored in the refrigerator.
Chop the celery and green onions 1-2 days in advance.
Prepare the vinaigrette 1-2 days in advance.
Toast the pecans ahead of time. I like to toast my pecans as soon as I buy them and then store them in the freezer in an airtight container. I store them in the freezer so they’ll stay fresh longer and won’t go rancid.