For the noodles, bring a good 4 litres of salted water (approx. 1 teaspoon salt per litre) to the boil. Clean, halve and wash the radicchio and cut out the stalk. Cut the radicchio into small pieces. Peel and chop the onion.
Pear wash, quarter, core and roughly dice. Grate the parmesan.
Add the pasta to the boiling salted water and cook according to the instructions on the packet. In the meantime dab the steaks dry and cut the fat edge crosswise several times. Heat 1 tablespoon of oil in a frying pan. Fry the meat for 3-4 minutes on each side.
Season with salt and pepper. Wrap in aluminium foil and let it rest for 5-8 minutes.
Heat 1 tablespoon of oil in the frying fat. Stir-fry the pear and radicchio for 1-2 minutes. Take out. Sauté the onion in the frying fat. Take off approx. 300 ml of the pasta water and add it to the onion with the wine.
Bring to the boil and simmer for 3-4 minutes. Stir in parmesan and crème fraîche, melt briefly. Season to taste with salt and pepper.
Drain the pasta and put it back into the pot. Mix with the sauce, pear and radicchio. Season to taste with salt and pepper. Cut the steaks into slices and serve with the pasta.