Rinse one cup of pearl barley in a fine mesh sieve under running water until the water is clear, then transfer to a medium sized pot, along with three cups of water, and boil for 30 minutes or as per the instructions on the packet.
While the barley is cooking, sear the chicken pieces in a little oil in a round-bottomed wok or frying pan until the skin is brown then set aside.
Heat the cooking oil and butter the same wok or pan then add the onion, garlic and grated carrot and sauté on low heat until the onion is translucent and garlic fragrant, taking care to brown but not burn the garlic.
Transfer the fried onion, garlic and carrot to your favourite soup or stew pot, then add the water, cabbage, potato, sliced carrot, mushrooms, gherkins, seasoning and spices, and simmer on low heat for 20 minutes.
Add the gherkin brine, chicken pieces and pearl barley, simmer for another 10 minutes or so. The barley will continue to expand, so add more water if necessary, then taste, and adjust the seasoning and spices to suit your palate.
Just before serving, add a tablespoon each of fresh parsley and fresh dill, stir, then distribute between bowls, garnishing with a dollop of sour cream and the remainder of the fresh herbs.