This refreshingly tart sauce can double as a salad dressing.
Whisk together yogurt and sour cream.
Stir in cucumber and green onion.
Stir in cumin, curry powder, turmeric, sugar, salt, and pepper.
Cover and refrigerate until ready to use. Stir well before serving.
Middle Eastern recipes often use a thick, creamy form of yogurt. To achieve a similar consistency, place plain, low-fat yogurt in a strainer lined with cheesecloth. Place strainer over a bowl and refrigerate for 24 hours. Discard liquid that collects in the bowl. Two cups of commercial yogurt will yield 1 cup of thick yogurt cream.