Wash the fillet and dab dry. Heat 1 tablespoon of lard in a flat roasting pan. Fry the fillet for about 5 minutes on all sides over a high heat. Season with salt and pepper. Cook in the preheated oven (electric cooker: 80 °C) for about 4 hours.
In the meantime peel and wash the carrots and cut them into sticks. Clean, clean and slice the mushrooms. Onion peel, finely dice. Pluck sage leaves from the stalk, chop if necessary. Pluck pancetta a little smaller.
Prepare the pasta in boiling salted water according to the instructions on the packet. Melt butter and sauté carrots in it. Season with salt and sugar. Deglaze with 200 ml water and cook covered for about 10 minutes. Wrap fillet in aluminium foil.
Put the roaster on the stove, add 1 tablespoon of lard and heat it up. Brown the pancetta and sage and take it out again. Fry the onion and mushrooms in the frying fat for about 5 minutes. Season with salt and pepper.
Deglaze with stock, bring to the boil briefly. Refine with cream, add sage and pancetta again and season again. Cut fillet into slices. Arrange vegetables, noodles, fillet and sauce on plates.