Using a vegetable peeler, cut carrot lengthwise into thin strips. In a medium bowl, combine carrot strips, raisins, and pecans. In a small bowl, stir together yogurt, orange juice concentrate, vinegar, and salt. Stir yogurt dressing into carrot mixture. Cover and chill for 2 to 24 hours.
Line two salad plates with spinach leaves. Divide carrot mixture between salad plates. Serve with pineapple chunks and mango slices.