Pat the sirloin dry with paper towels
Trim excess fat if needed
Season both sides with salt and pepper
Let it sit at room temperature for 20 to 30 minutes
Preheat a skillet, grill, or oven
Add a little oil if using a pan
Sear the sirloin over high heat for 2 to 4 minutes per side
Lower the heat or move to the oven to finish cooking
Cook to your preferred doneness
Rest the steak for 5 to 10 minutes before slicing
Slice against the grain before serving