Preparation:
Heat oil in large saucepan over medium heat. Add onion, cook for 10 minutes or until tender. Add potatoes, pears, nectar, broth and cinnamon stick; cook until mixture comes to a gentle boil. Reduce heat to low; cook for 45 minutes or until potatoes are tender. Remove cinnamon stick.

Puree soup in several batches until smooth; return to saucepan. Season to taste with salt and ground black pepper. Serve with a dollop of sour cream and a sprinkle of cinnamon, if desired.