Chicken Kiev', aka Tsiplenokovo Po-Kievski and also known as 'Chicken Supreme' (in Europe), is a boned and flattened chicken breast that is then rolled around a chilled piece of herbed butter which is then breaded and fried. This method of preparing chicken is not of Russian origin as the name Kiev' would imply. It was actually created by French chef, Nicolas (Francois) Appert (1749-1841). It is said that restaurants in NYC wanting to welcome the many Russian immigrants gave the name Kiev. The name went back to Europe and there known as 'Chicken Supreme'. After World War II, Chicken Kiev became popular in Russian restaurants. Russian cookbooks have recipes for a similar dish called "côtelettes de volaille". This version is compliments of Alton Brown. We baked it (rather than fry) at 400F. for 30 minutes with great results. The tarragon and panko give this recipe a very unique flavor.