Place the chicken in a pot with 1.5 liters of water and bring to boil.
Once the water starts boiling, you will notice a foam forming on top. Carefully remove.
When the foam doesn’t form anymore, add the onion, carrots and celery in the soup. Meanwhile, wash the rice and let it soak.
After 15 minutes, add the rice and take the chicken out to debone the meat. Shred the meat and put it back in the soup. Add salt to taste. Turn the heat off and let it cool for 5 minutes.
Meanwhile, mix the sour cream with the egg yolks and the lemon juice in a big bowl.
After the five minutes have passed, take a ladle of soup and pour it over, whilst whisking the liquid fast. Repeat until the sour cream mixture comes at the same temperature as the soup. Then pour the sour cream mixture over the soup.
Taste to make sure it’s sour enough for you. If it’s not, add some more lemon juice.
Add chopped dill or parsley and serve hot.