Wash and peel the asparagus and cut off the woody ends. Cook the asparagus in boiling salted water with 1 pinch of sugar for 15-20 minutes
Wash the potatoes thoroughly and boil in water for about 20 minutes
Wash the meat, dab dry and wrap with bacon. Possibly get stuck. Heat 1 tablespoon of lard in a coated pan. Fry the medallions for about 10 minutes, turning them over. Season with salt and pepper
Beat the egg yolks, cream and 1 pinch of salt in a hot water bath for 6-8 minutes until creamy. Divide the sauce into 2 portions
Heat part of the sauce again in a bain-marie and stir in the butter in pieces. Stir in mustard at the end
Also reheat the rest of the sauce in a bain-marie. Stir in orange juice and zest with a whisk
Drain the potatoes. Heat 2 tablespoons of clarified butter in a large pan. Fry the potatoes all around. Season with salt and pepper. Wash the chervil and pluck it from the stems. Arrange everything and sprinkle with chervil