Fry the roast beef vigorously on all sides, but briefly.
Take aside and rub with salt and herbs. Dip the hay in cold water. Put half of the hay in a roasting pan, press down a little. Place the roast beef in the middle, cover with the remaining wet hay and press the hay well all around.
Put the roasting pan in the oven preheated to 120-130 ° and cook without the lid until the core temperature has reached almost 57 °, which takes about 1.5 hours or possibly a little longer.