- 1 tablespoon olive oil
- 2 large leeks (white and pale green parts only), chopped
- 1 tablespoon plus 2 1/2 cups water
- 2 teaspoons curry powder
- 2 small white potatoes, peeled, cut into 1/2-inch pieces (about 10 ounces)
- 1 teaspoon salt
- 4 cups (packed) fresh baby spinach leaves (about 4 ounces)
- 2 cups low-fat (1%) milk
- 1/2 cup plain nonfat yogurt
- 1/4 cup chopped fresh cilantro
- Heat oil in heavy large saucepan over medium heat. Add leeks and 1 tablespoon water; sauté until leeks are tender, about 5 minutes. Add curry powder and stir 30 seconds. Add remaining 2 1/2 cups water, potatoes and salt and bring to boil. Reduce heat, cover and simmer until potatoes are tender, about 10 minutes. Stir in spinach; simmer until just wilted, about 1 minute. Cool slightly.
- Working in batches, puree soup in blender until almost smooth. Return soup to same saucepan. Add milk and bring to simmer. Season soup to taste with salt and pepper.
- Ladle soup into 4 bowls. Whisk yogurt until smooth. Swirl 2 tablespoons yogurt into each bowl. Sprinkle with cilantro and serve.