Wash the chervil and dab dry. Wash pork fillets, dab dry and cut into 12 medallions. Cut bacon in half lengthwise. Wrap each medallion with 1 slice of bacon and a chervil leaf.
Heat clarified butter in a frying pan. Fry pork medallions on both sides until golden brown. Remove the medallions from the frying fat, place them on a fat pan and finish cooking in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 15 minutes.
Meanwhile, wash the asparagus, cut off the woody ends and possibly peel the lower third. Cook the asparagus spears in salted water with 1 pinch of sugar for about 8 minutes until al dente. Wash the tomatoes and dab dry.
Melt in the frying fat. Take out and keep warm. Deglaze frying fat with broth. Bring to the boil and simmer for 2 minutes. Stir in crème fraiche. Season with pepper. Spread the sauce streakily on plates.
Add the balsamic cream drop by drop. Use a wooden skewer to draw streaks. Arrange asparagus, medallions and tomatoes on it.