Preheat the oven to 80 ° C fan oven. Heat the oil in the pan. When the oil is really hot, fry the roast beef on all sides for about 2 minutes.
Then place the meat on the grid and leave in the oven for 2 hours at 80 ° C. After the cooking time, switch off the oven and let the meat rest in the oven for about 5 minutes, then serve.
Everyone salt and pepper as they please at the table. French fries and herb butter go well with it.