Crème fraîche is a thickened cream product with a mildly tangy, nutty flavor; you'll often find it in tubs near the gourmet cheeses. If you can't find it, you can substitute full-fat sour cream. Be careful to cook the potatoes only until just tender and no more; that way, they'll hold their shape.
3 pounds small red potatoes, quartered
1/2 cup crème fraîche or sour cream
1/3 cup fat-free buttermilk
1/4 cup chopped fresh parsley
2 tablespoons chopped fresh chives
1 tablespoon chopped fresh dill
1 1/4 teaspoons kosher salt
1/2 teaspoon freshly ground black pepper
1 large garlic clove, minced
How to Make It
Place potatoes in a Dutch oven, and cover with water. Bring to a boil. Reduce heat, and simmer 15 minutes or until just tender; drain. Cool for 30 minutes.
Combine crème fraîche and remaining ingredients in a large bowl; stir with a whisk. Add warm potatoes; toss gently to coat. Serve at room temperature or chilled.