Add the potatoes to a large pot and cover with water so there is an inch of water above the potatoes. Bring to a boil and cook until the potatoes are just fork tender, about 10 minutes. Drain the potatoes and allow them to cool for about 10 minutes.
3 pounds small creamer potatoes
In a large mixing bowl combine the potatoes, scallions, celery, and hard boiled eggs.
2 hard boiled eggs, 2 scallions, 2 celery stalks
Mix together the yogurt, mayonnaise, vinegar, dill, salt, and pepper, whisking until fully combined. Taste the dressing and add more salt and pepper as needed.
1 cup nonfat plain yogurt, 1/2 cup light mayonnaise, 1 tablespoon white vinegar, 1 teaspoon dried dill, 1/2 teaspoon kosher salt, dash of pepper
Add the dressing to the potato mixture. Toss so the dressing fully coats the ingredients.
This salad gets better as the dressing soaks into the potatoes. Make up to 24 hours in advance and store in the refrigerator for up to 2 days.