For the steak marinade
Mash the anchovies and mix them in a bowl with olive oil, tarragon vinegar, garlic, oregano and tarragon.
Coating the steaks
Pre-heat the Otto Grill
Pre-heat the Otto Grill onto 800°C for three minutes. Take the steaks out of the marinade and lightly pat it off, so that it doesn't burn when grilling. Put the fillet steaks on the grill rack and grill them for about one minute on each side, until they have a nice crust. Then set the grill rack on Meat-o-Meter stage 5 and let the grilled fillet steaks cook until they have reached the desired level of doneness.