Cast iron is one of the most popular materials for cooking food, and many restaurants use cast iron skillets to cook delicious, juicy steaks. Cast iron heats up quickly, releases foods easily, and maximizes flavor by perfectly browning its contents. Unlike many other fry pans, cast iron can also be safely transferred from stovetop to oven. Additionally, when properly seasoned, cast iron is relatively nonstick, 100% chemical-free, and will not damage foods as you cook them. Finally, cast iron can be used with electric, gas, or induction heat and is very easy to clean. With all of these things in mind, it is easy to see why a cast iron skillet is the perfect tool for cooking a high-quality steak.

For step by step directions with pictures check out: http://www.webstaurantstore.com/faq/182/how-to-cook-steak-in-a-cast-iron-skillet.html