Add the following ingredient to your blender in this order.
1 chopped frozen banana
2 peeled chopped oranges
3 slivers of fresh ginger root
1/2 cup shredded carrot
5 romaine leaves, roughly chopped
Pour about 1/2 cup of water over the mixture and blend for about 30 seconds, if you are using a fresh banana you may wish to add a few ice cubes. Add the yogurt if desired and blend for at least 1-2 minutes for a smooth consistency.