Clean the mushrooms, wash if necessary, cut into slices. Peel and chop onions. Wash the rosemary, dab dry and chop coarsely.
Pat the meat dry. Heat 1 tablespoon of lard in a pan. Fry the steaks on each side. Season with salt and pepper. Take out, wrap in aluminium foil and let rest for 5 minutes.
Heat 1 tbsp. lard in the frying fat. Fry the mushrooms and onions until golden brown. Season with salt and pepper. Deglaze with wine, stir in crème fraîche and simmer for 2-3 minutes. Stir in peppercorns, coloured pepper and rosemary.
Unroll the steaks and stir the resulting gravy into the sauce. Add baguette.