Sprinkle the sides of each steak with pepper and, with the heel of the hand, press the pepper into the meat. Let stand 30 minutes.
Heat a heavy skillet and sprinkle a light layer of salt over the bottom. When the salt begins to brown, add the steaks. Cook until well browned on one side. To produce a very rare steak, cook 30 seconds at high heat. Turn the steaks, lower the heat to moderate and cook 1 more minute. Adjust the heat and time to cook the steaks to a greater degree of doneness.
Place a teaspoon of butter on each steak and add Tabasco, Worcestershire and lemon juice.
Turn the heat to low, blaze with cognac and transfer steaks to a platter. Swirl the sauce in the skillet and pour over the meat. Sprinkle the steaks with parsley and chives.