Wash the fillet, dab dry. Heat the oil in a pan and fry the meat on all sides, turning it over. Season with salt and pepper. Remove and place in an ovenproof dish. Cook in a preheated oven (electric cooker: 100 °C/ convection oven: not suitable/ gas: not suitable) for approx. 1 1/2 hours. (core temperature 61 °C)
Knead the flour and 2 tablespoons of butter, divide into small flakes and chill. Wash and clean the mangetouts. Peel onion and chop finely. Remove the fillet, cover with aluminium foil and let it rest for a short time. Cook pasta in boiling salted water according to package instructions. Add the sugar snap peas and cook for the last 2 minutes
Drain the green pepper. Coarsely crush black pepper. Sauté onion in frying fat. Add pepper and pink berries and fry briefly. Deglaze with cream and beef stock, bring to the boil. Gradually fold in flour butter until the sauce thickens. Season to taste with Noilly Prat, salt and pepper
Drain the pasta, let it drain. Melt 1 tablespoon butter and toss the noodle mixture in it. Serve fillet with noodles and pepper sauce