First clean the soup greens and chop the celery tuber and carrot as finely as possible (ideally in a food processor or similar). Cut the leek into rings. Cut the celery stalks into small pieces. Chop the parsley into small pieces. Peel and dice the potatoes. Cut the bacon into small pieces.
After 1.5 hours the peas have completely disintegrated and you have a completely creamy consistency. If necessary, add a little more water in between / at the end. The potatoes should be added approx. 20 minutes before the end of the intended cooking time. If you are vitamin-conscious and really finely chop it, you can only add the celery and carrots at this point.
About 5 minutes before the end of the cooking time, add the sausage, parsley and marjoram, season sweet and sour (with mustard, vinegar and sweetener), round off with salt and pepper.
To serve, sprinkle with a little chopped red onion and a little parsley, served with rustic grain bread or rolls. Eat for two and the rest the next day, because then it tastes even better.