Preheat the oven to 350 degrees F.

Wash the potatoes and place them directly on the oven baking rack. Bake for 45 to 60 minutes, until very tender when pierced with a skewer.

Meanwhile, combine the yogurt, sour cream, chives, 1/2 teaspoon salt, and 1/4 teaspoon pepper and place in a serving bowl. Garnish with extra chives. Chill.

When the potatoes are done, cut them down the middle and squeeze both ends. Sprinkle with salt and pepper and serve the hot baked potatoes with the cold chive dressing.