Peel and finely dice the shallot. Dab meat dry and season with salt. Heat oil in a pan. Fry the tournedos for about 2 minutes on each side.
Remove the meat from the pan, cover and let it rest. Sauté shallot in cooking fat for about 2 minutes, add peppercorns and whipped cream, bring to the boil and simmer gently for about 3 minutes. Put the tournedos back into the pan, sprinkle with cognac and light up immediately. Mashed potatoes and green beans are delicious with it.