From seriouseats.com
Ingredients:
1/3 cup crème fraiche or sour cream 1/2 cup buttermilk 2 tablespoons chopped dill 2 tablespoons chopped fresh chives 1/2 teaspoon garlic powder 1/8 teaspoon pepper 2 tablespoons store-bought or homemade harissa 1/2 teaspoon kosher salt
Preparation:
In a medium bowl, whisk together the crème fraiche or sour cream, buttermilk, dill, chives, garlic powder, black pepper, harissa, and salt. Use immediately as a dressing or dip, or store in the refrigerator for up to one week.