Wash the duck and pat dry. Rub vigorously with salt and pepper inside and out. Close the opening of the duck with a wooden skewer and tie up with kitchen string. Tie up wings and legs as well.
Fry on the fat pan in a preheated oven (electric range: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 2 hours. If desired, scoop with the forming fat from time to time. In the meantime, peel and chop the onion.
Fry in hot oil. Pluck the sauerkraut slightly. Add bay, juniper berries and peppercorns and braise for about 130 minutes. In the meantime wash the apples. Cut 2 slices from the middle of each, sprinkle with lemon juice and place on the duck about 10 minutes before the end of the roasting time.
Cut out the core of the remaining apples. Roughly dice the pulp and add to the sauerkraut after 20 minutes. Wash the herbs and chop them coarsely, except for a few leaves for garnishing. Serve vegetables and duck sprinkled with herbs and garnished.