Preheat the oven and warm up the puff pastry patties according to the instructions on the packet.
Start preparing the sauce a little beforehand: heat the clarified butter in a coated pan, sear the meat vigorously but briefly, then remove it, season with salt and pepper. Chop the onion and sauté in the roast, cut the mushrooms into slices and add. Dust with flour, stir briefly and then deglaze with cognac. Add the cream and stock, simmer for a few minutes at medium temperature. Add the meat again and warm it up, fold in the parsley and season with lemon juice, salt and pepper.
I like to serve it with a lamb`s lettuce.
Of course, the strips of meat can also be served with rice or noodles.