Recipes of Russian cuisine

There are as many recipes for traditional Russian fish soup, known as or  uha , as there are cooks in Russia. It can be made elegantly with clear fish stock and served with a side of mini fish dumplings known as  pelmeni or mini fish pies ( kulebiak ). Or it can be very rustic and flavorful as I have done here. This is my adaptation using walleyed pike, but any white-fleshed or even salmon can be used. Traditionally, it is made with fish heads and bones as well as different types of fillets. This soup is hearty enough to be eaten as a main course. Ingredients 2   pounds   cod , or pike, perch, or salmon fillet, cut into 2-inch pieces 1/2   pound   fish heads,  and/or bones 8   cups   water 2   medium   onions , sliced 1   stalk   celery , chopped 2   large   carrots , sliced Black  peppercorns ,   to taste 1   bay leaf 2   sprigs   parsley 1   tablespoon   salt , or to taste Fresh dill,  optional, for garnish Chives,  chopped, optional, for garnish Green onions,   chopped, optional, fo