Wash the fillet, dab dry, cut into small medallions. Wrap 1/2 slice of bacon and 1 sage leaf around each and pin them. Clean and wash the sprouts. Cook in boiling salted water for about 20 minutes.
Peel, wash and coarsely grate the potatoes. Stir in egg and flour, salt. Shortly before serving, fry in 2 tablespoons of hot oil in portions until golden brown. Heat the rest of the oil. Fry the medallions on each side for 2 minutes.
Season with salt and pepper. Deglaze with stock. Remove meat and keep warm. Stir the jam into the stock. Add remaining sage leaves. Season sauce with salt and pepper. Arrange medallions, Brussels sprouts and rösti with sauce on plates.
Serve garnished with orange.