Place tenderloin in the freezer for 2 hours.
Preheat the oven to 200 degrees F.
Remove the tenderloin from the freezer. Using an electric knife, cut the beef into 3/8-inch thick slices. Place slices of beef, 1 at a time, between 2 pieces of plastic wrap. Squirt the beef lightly with water and squirt the top of the plastic wrap as well. Pound to no less than 1/8-inch thickness. Lightly brush each slice of beef on both sides with vegetable oil and season with salt and pepper on both sides. Set aside.
Heat a large cast iron skillet over high heat for 3 to 4 minutes. Reduce heat to medium and turn skillet upside down over burner. Brush the pan lightly with oil. Place 2 to 3 slices of beef on the pan at a time and sear for 10 seconds on each side. Remove to an ovenproof platter and keep in warm oven. Repeat until all of the beef has been cooked. Serve immediately.
Recipe courtesy Alton Brown, 2004