Peel the carrots and cut into slices. Peel and chop the onion.
Then steam the carrots and butter over low heat for 10 minutes. Add orange juice, onion and stock and bring to a boil. Then add the thyme, salt and pepper and cook for 20 minutes.
Then puree to a smooth mass, place on plates and add a dollop of sour cream and nutmeg each to serve.