Put a drop of oil in a stock pot and brown off the sausages or brats. Let them get cook color on all sides, then add 2 cups of the chicken stock and bring up to a boil. Scrape any browned bits from the bottom of the pot. Lower the heat and simmer, covered, for about 10-12 minutes, until the brats are cooked. Remove the brats to a plate, and strain the broth and set aside. (I like to strain the broth because there will always be little bit and bobs floating around, and it's nicer without.) When the brats have cooled a bit, slice them.

Meanwhile add a tablespoon of oil to a a new soup pot and saute the onions, celery, and carrots for about 4-5 minutes, just until slightly softened but not browned, stirring often.

Add the potatoes, cabbage, and all 4 cups of the stock to the pan, along with the bay leaves, salt, pepper, and marjoram.

Bring up to a boil, then lower the heat and simmer, partially covered, for 10-15 minutes, or until veggies are almost tender. Take a taste to be sure. Add the sliced brats and simmer for another 5 minutes until everything is perfectly tender.

Taste to adjust the seasonings and serve hot with a sprinkle of fresh chopped parsley.