Cook 1 cup tricolor quinoa (rinsed) as the label directs. Spread on a plate to cool. Whisk 2 tablespoons white balsamic vinegar, 1 tablespoon minced shallot and 1 teaspoon dijon mustard in a large bowl. Whisk in 2 tablespoons olive oil. Add 1 chopped pear, 1/4 cup chopped walnuts, 2 sliced celery stalks and the quinoa; toss. Season with salt and pepper.