In mixing bowl, toss apple with one teaspoon of the orange juice. Add celery and pecans. In small bowl, whisk together sour cream, mayonnaise, Stevia In The Raw®, and remaining orange juice until smooth. Mix in 3 or 4 grinds of pepper. Add dressing to apple mixture and use fork to toss 3 or 4 times.
Spread orange sections on a paper towel and blot dry, then add to salad. Toss until salad is well coated with dressing. Transfer salad to serving platter or divide it among 4 salad plates. Sprinkle on coconut. Serve immediately.