Peel and finely chop the onions and ginger. Peel and chop sweet potatoes and carrots.
Heat the oil in a saucepan and sauté the onions and ginger. Add sweet potatoes and carrots and sauté briefly. Pour in the broth and season with paprika, salt and pepper. Let simmer for 20 minutes.
Wash, pat dry and chop parsley. Mix the soup with a hand blender until smooth.