Cut the leek, carrots and potatoes into small pieces.
Heat the oil in a pressure cooker and fry the two slices of bacon. Add the vegetables and sauté briefly. Then add the lentils and sausages as well as the water. Close the pressure cooker and cook everything on the second ring (pressure indicator) for 10-13 minutes. Then let the soup cool down slowly and season with vegetable broth. I remove the bacon before seasoning.