Well washed rice add into 1/5 l of boiling salted water and simmer. Squeeze the juice from the lemon half into simmering water with rice to hold rice grains shape.
After about 20 minutes, when the rice is been well cooked, drain it.
Whisk sour cream, one whole egg and one egg yolk together. Then, add cooked rice to it and pepper it well.
Pour hot clear broth over thus prepared rice, stirring constantly.
Then you can acidify to taste with lemon juice.
Before serving the soup, sprinkle it with finely chopped parsley leaf. Serve warm.