Lighter Potato Salad

Why I Love This Recipe
I've been watching my weight the last month and would love to have some potato salad with hamburgers (turkey) burgers on the grill. I found this in a magazine and can't wait to try it.
Ingredients You'll Need
3 lbs. small red potatoes, scrubbed, with skins on and cut in half if large
3 tsp. salt
2 cups plain 2% Greek yogurt
1/3 cup low fat sour cream
4 scallions, trimmed, finely chopped
1/4 cup snipped fresh chives
3 T. fresh lemon juice
1 1/2 T bottled horseradish
1 T. sugar (I'll use Splenda)
1/4 tsp. black pepper
Directions
Place potatoes in large pot. Add enough water to cover. Add 2 tsp. of the salt.
Boil about 12 minutes or until knife-tender. Drain; let cool.
Whisk yogurt, sour cream, scallions, chives, lemon juice, horseradish, sugar, pepper and salt in large bowl.
Quarter potatoes; add to dressing.
Stir gently until all pieces are coated.
Refrigerate until serving.