Not sure what shitty kind of sour cream yall get over there, but what is known as smetana in Eastern Europe is widely employed as a condiment. You can use it with meat dumplings or meatballs, or potato dumplings, or plain boiled potato or salted fish, you use it in salads, in soups like borscht. You can dip crepes or pancakes into it, or various kinds of pirozhki.