Cut the heart and pour cold water for about an hour.
Put cook in clean water with the addition of carrots, onions, spices, bay leaves and herbs. Cook for about 3 hours. Add salt at the end.
Cut all the vegetables into medium cubes.
Melt butter in a pan, add flour and fry over low heat until brown. . Then you need to gradually pour 2 cups of water and simmer until thickened, stirring constantly. Then add the heart and vegetables, add sour cream.
Mix and add raw potatoes.
We simmer on low heat for 30 minutes, try and add the necessary spices and salt.