Roast the turkey breast roast according to the directions on the packaging, about two hours. Set aside to cool.
Clean and chop the parsley, discarding the bottom two to three inches of the stems.
In a large bowl, stir together the celery, green onions, parsley, apples, apricots, and walnuts.
In a small bowl, whisk together the yogurt, mustard, honey, minced garlic, and pepper to make the dressing.
Chop the turkey and add it to the large bowl along with the dressing. Stir everything together and serve on its own or in a pita or croissant.