Creamy Carrot and Sweet Potato Soup

In a large Dutch oven, heat canola oil over medium heat. Add onions to pan; cook 4 minutes or until tender, stirring occasionally. Stir in cinnamon and 1/4 teaspoon nutmeg; cook 1 minute, stirring constantly. Add sweet potatoes, carrots, broth and water; bring to a boil. Cover, reduce heat, and simmer 35 minutes or until vegetables are tender.

Place half of soup mixture in a blender. Remove center piece of blender lid (to allow steam to escape); secure blender lid on blender. Place a clean towel over opening in blender lid (to avoid splatters). Blend until smooth. Pour into a large bowl. Repeat with remaining soup mixture. Stir in skim milk, salt and pepper. Top each serving with about 2 teaspoons plain Greek yogurt. Sprinkle with nutmeg, if desired.