2 New York strip or sirloin steaks (6 to 8 oz. each), 3/4 inch thick, patted dry
Salt
1-1/2 Tbs. coarsely ground black peppercorns
Olive oil for the pan
1/2 cup red wine (Cabernet Sauvignon or Pinot Noir)
2 to 3 Tbs. butter, sliced
Heat the oven to 500°F. Sprinkle the steaks with salt on both sides, and then press the ground peppercorns into the steaks on both sides. Set a large cast-iron skillet over medium-high heat and add just enough olive oil to make a light film. When the oil is very hot, add the steaks, cooking until nicely browned on one side, about 3 minutes. Flip the meat over and put the skillet in the oven. For medium-rare steaks, roast for 3 minutes for 6-oz. steaks; 4 minutes for 8-oz. steaks. Check for doneness with the tip of a knife or by pressing with your fingertips, keeping in mind that the steaks will cook a bit more as they sit. Transfer the steaks to a warm plate and tent with foil.
With a spoon, remove any fat from the skillet. Put the skillet back on the burner and heat to medium high. Add the wine and cook until it's reduced to 2 Tbs., about 7 minutes, scraping up the browned bits with a wooden spoon. Whisk in the butter a slice at a time, whisking until completely melted. Taste and adjust the seasonings, drizzle the sauce over the steaks, and serve immediately with more sauce on the side.