Mayo-Free Potato Salad

1½ pounds small red potatoes, boiled and
quartered
⅔ cup plain yogurt
⅓ cup sour cream
1 cup chopped celery
½ cup sliced Kalamata olives
¼ cup chopped scallions
¼ cup chopped parsley
1 tbsp lemon juice
Salt and pepper

Directions:
Toss all ingredients together and serve.