In a large sauce pan, heat the oil and cook the carrots and onions for 10 minutes over medium heat
Transfer the carrots and onions to a pot, add the grated ginger and cook for less than a minute on medium heat
Add the broth and bring to a boil, then reduce to a simmer and and cook, covered, over medium-low heat for 15-20 minutes, until the veggies are very soft.
Move the soup to a blender and blend until smooth. Transfer it back into the pot.
Stir in the milk and the orange juice, heat it back up. Once the soup is hot, it is ready to serve. Use salt and pepper to season.