Butternut Squash and Carrot Soup

Ingredients

• 1 butternut squash (1 1/2 to 2 pounds)
• 3 tablespoons olive oil
• 1 large yellow onion, chopped
• 1 1/2 teaspoons sweet paprika
• 1 1/2 teaspoons ground cumin
• 1 teaspoon turmeric
• 1 1/2 teaspoons ground coriander
• 4 large carrots, coarsely chopped
• 1 teaspoon sugar
• 3 cups chicken stock
• 3 cups water
• Salt and freshly ground pepper
• 1/2 cup plain yogurt
• 3 tablespoons chopped fresh cilantro