Clean, wash and chop the potatoes, soup greens and mushrooms. Peel and dice the onions.
Heat the fat in a saucepan and sauté the onions while stirring. Add the potatoes, soup greens and mushrooms and fry a little more. Pour in the chicken stock, add the thyme and cook, covered, for 20 minutes. Cut the sausages into slices and let them steep in the soup for 5 minutes. Finally, season with salt and pepper.