Gordon Ramsay transforms the classic Beef Wellington recipe with a cast-iron skillet to cook it with color, depth, and flavor to give the beef fillet a unique taste. Dijon mustard is used to tenderize, marinate, and give a gentle kick to the filet mignon. With layers of prosciutto, chive crepes, seasoned mushrooms, puff pastry, and puff pastry crust, you have created a recipe for pasta or sandwiches that you can use time and time again, no matter what the occasion.