Clean the cabbage, quarter, wash and cut out the stalk. Slice the cabbage into strips or cut it finely. Place in a bowl and sprinkle with 1 tsp. salt. Knead vigorously with your hands for a few minutes.
Peel and finely chop the onion. Cut bacon into small pieces. Heat 1 tablespoon of oil in a frying pan. Fry the bacon until crispy. Take out and drain on kitchen paper. Fry the onion in the frying fat.
Deglaze with vinegar and 1/8 l water, bring to the boil and simmer for 2-3 minutes. Season with stock, pepper, sugar and possibly salt. Pour hot marinade over the cabbage. Let it cool down a little bit, then knead it again thoroughly.
Leave to soak for about an hour.
Coarsely grate the lye pastry on a kitchen grater (put the pretzel in a freezer bag, seal it, roll it over several times with a cake roll until it is crumbled). Whisk the egg. Halve the Leberkäse and turn it in flour first, then pull it through the egg and finally turn it in the pretzel breadcrumbs.
Press the crumbs lightly.
Heat 2 tablespoons of oil in a frying pan. Fry the Leberkäse in it over medium heat for 2-3 minutes on each side until golden brown.
Wash the parsley, shake dry, chop and fold into the coleslaw with the bacon. Season to taste again. Serve with the meat loaf.