In large pot, sautée carrots and onions with 4 tablespoons of cooking oil. Sautée until vegetables are soft (7-10 minutes).
Add water to the pot and bring it to a boil.
Cut potatoes into one inch cubes. Add potatoes into boiling water and let it cook for 15 minutes.
Dice hard boiled eggs, scallions, dill and sorrel.
Add green onions, eggs and dill to the soup, let it cook for about five minutes. Add sorrel to the soup. Remove soup from the heat and let it sit for about 10 minutes.
Soup is best when it is served warm. Optionally, add a dollop of sour cream to it before serving.