Season the pork fillet with salt, pepper and paprika and rub with mustard. Put the pork fillet in a freezer bag, mix together with the coffee grounds and olive oil, close well and leave to soak in the refrigerator for 2 days.
After 2 days, remove the pork fillet, wash off the coffee grounds and season the meat a little more with salt and pepper.
Fry the meat well in a little olive oil, then cook in the oven at 190 degrees for about 12-15 minutes, depending on the size.
Let the wine boil down in the gravy and add the espresso. Finally add the cream and just keep warm.
Let the pork fillet rest a little. Then serve the meat with the sauce.