Fry the meat in clarified butter and remove from the roaster. Fry the onion, garlic and vegetables and let them take on color. Dust with a little flour and deglaze with red wine, beef stock and calvados. Let simmer in a preheated oven at 160 degrees for about 3 hours.
Then remove the roast, puree the vegetables - except for the chilli pepper - with the sauce, dissolve the dark chocolate in the sauce, season with salt and pepper and refine with crème fraîche. Possibly add a shot of calvados.