Season the steak with salt and pepper.
Press the black peppercorns into the steak on both sides.
Heat olive oil in a large skillet over high heat.
Sear the steak for 2-3 minutes per side, or to your desired level of doneness.
Remove the steak from the pan and let it rest for 5 minutes.
Melt butter in the same skillet over medium heat.
Whisk in flour and cook for 1 minute.
Gradually whisk in heavy cream and beef broth until smooth.
Bring to a simmer and cook until thickened, stirring occasionally.
Stir in Dijon mustard, salt, and pepper.
Slice the steak and top with the creamy peppercorn sauce.
