Cooking guideline based on 3cm thick steak Rare: 4 minutes on each side Med-rare: 5 minutes on each side (recommended) Medium: 6 minutes on each side Well-done: Not recommended Substitute fillet with rump or ribeye steak
To make the marinade, mix together all the marinade ingredients in a bowl until well combined and pour into a zip lock bag.
Transfer the fillet to the zip lock bag with the marinade and turn to coat. Place in the refrigerator for 2 to 4 hours to marinate, the longer the better.
Grill the fillet on a hot fire or griddle pan, turning to cook on all sides to your preferred doneness (see cooking guideline above).
Cover the fillet with tinfoil and leave to rest for half its cooking time.
Slice the beef into thick medallions and season with salt and freshly ground black pepper.