Peel the onions. Halve to 1 and cut into slices. Mix with 1 tablespoon of oil and some cayenne pepper
Season the Kasseler with pepper. Place on the bone and place on a fat pan with the halved onions. Fry in a hot oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for 50-60 minutes. Stir onions in between. After approx. 30 minutes pour on 1/2 l of hot water bit by bit. Spread the pork loin with approx. 1 tbsp. jelly. Stir the rest into the onions, fry until done
In the meantime clean, wash and cut the cabbage into strips. Dice the remaining onion finely and fry it in hot butter until it becomes glassy. Braise the cabbage briefly. Season with salt and a little pepper. Stir in 100 ml water and 1 teaspoon broth, bring to the boil. Cover and stew for 15-20 minutes
Wash the parsley and chop it except for something to garnish. Stir egg and parsley into the dumpling dough. Form the dough into a roll. Cut into about 12 pieces. Heat 3-4 tablespoons of oil in a large frying pan. Fry the potato cookies in it in 2 portions while turning them golden brown. Keep warm
Wrap the cured pork in aluminium foil and let it rest for 5-10 minutes. Bring the onions to the boil in a saucepan together with the frying stock. Stir the starch and 1-2 tbsp. water until smooth and thicken the stock. Season to taste
Slice the smoked pork loin. Serve with savoy cabbage, potato biscuits and onion sauce. Garnish the slices with the rest of the parsley