Take your beef joint out of the fridge for 30 minutes prior to cooking to allow it to come to room temperature. Pat dry and drizzle with olive oil then season liberally with salt and pepper, a good 10 turns of the mill per side. Sprinkle with the seasoning.
Preheat the air fryer ( I used my Cosori XXL) 400°F / 200°C for 10 minutes. Place the beef in the air fryer basket and cook for seven minutes per side (14 minutes total).
Reduce the temperature to 350°F / 180°C and cook for a further 15 minutes per side. Check the core temperature with an instant read thermometer inserting the probe in the middle thickest part. If the beef is not quite done then continue cooking for a few more minutes (3-5).
Transfer the beef to a plate and cover loosely with foil. The temperature will continue to rise slightly as it rests – check my roasting time chart to ensure roasting perfection.
Rest for 20-30 minutes then slice against the grain and serve with your favorite side dishes, such as my Air Fryer Yorkshire Puddings and Perfect Roast Potatoes!