Preheat the oven to 80 °
Mix (walnut) oil with the seasoning ingredients and brush the steaks with it
Put the oiled-seasoned steaks on the braising plates and put them in the oven (80 ° O-U heat) for about 90 minutes
after 90 min: sauté the onion, add the chopped porcini mushrooms, dust with flour and deglaze with the beef stock, simmer briefly
Puree the basil, parsley, oil, pine nuts (were just in the house, can be varied) with a magic wand to make the pesto, arrange on the plate.
Increase the temperature to 220 ° and switch to convection. Top the steaks with mozzarella. "Grill over" for about 15 minutes, then arrange and serve on preheated plates prepared with the side dishes.