Cut the pork fillet into approx. 1.5 cm thick slices. Salt, pepper and season with horseradish, then fry in 40 g very hot butter for about 10 minutes. Put the fillet in a serving bowl and keep warm.
Chop the mushrooms and tomato peppers. Pour into a saucepan and mix with the cube broth, beaten egg yolks and spicy mustard. Heat the sauce, but don`t let it boil.
Pour 4 tablespoons of warmed cognac over the pork fillets and flambé.