Peel and finely dice the shallots. Wash tarragon and shake dry. Pluck off the leaves and chop finely. Put butter, shallots, capers, anchovies, ketchup, mustard and cognac into a mixing cup and puree to a smooth mixture with a chopping stick. Stir in tarragon. Season the butter mixture with a dash of Worcester sauce, a little salt and pepper and chill for about 30 minutes
Dab the fillet of beef dry and cut into 4 steaks/ medallions. Heat clarified butter in a large pan. Fry the steaks on both sides for approx. 1 minute, season with salt and pepper and continue to fry at medium heat for approx. 4 minutes, turning them over (also fry the sides all around). Wrap the finished steaks in aluminium foil and let them rest for about 5 minutes
Bring liquid cream to the boil briefly in a small pot. Gradually add cold butter mixture over a low to medium heat, let it melt and fold in well with a whisk. Stir the whipped cream into the finished sauce. Arrange the fillet steaks on plates and pour the hot sauce Cafe de Paris over them. Garnish with tarragon. Serve with leaf salad
Waiting time approx. 20 minutes