Two-Potato Salad

3 lbs red potatoes, cut into 1 inch pieces

3 lbs sweet potatoes, peeled and cut into 1 inch pieces

6 TBSP vinegar

1 ½ cups sour cream

½ cup fresh chives, chopped

1 ½ tsp salt

½ tsp pepper

Boil potatoes until tender. Drain and place in large bowl. Drizzle with vinegar and toss to coat. Let cool to room temperature. Combine remaining ingredients and mix with cooled potatoes until coated.