Mix vinegar and 3/4 litres of cold water. Wash and peel the black salsifies, cut them into 4 cm long pieces and place them in the vinegar water. Wash and peel carrots and potatoes as well.
Cut carrots into sticks of about 4 cm length, cut potatoes in half. Drain the black salsify and cook with the carrots covered in approx. 1/2 litre salt water for 20-25 minutes. Cover the potatoes and cook in boiling salted water for about 20 minutes.
Meanwhile wash parsley and chives, dab dry and, except for some parsley for garnishing, chop or cut into small rolls. Wash chops, dab dry and season with salt and pepper.
Heat the oil in a pan and fry the chops for about 4 minutes on each side and keep warm. Drain the vegetables and measure 1/4 liter of vegetable water. Mix with vegetable stock. Heat the fat in a pan and sauté the flour in it.
Add stock and milk, bring to the boil and simmer for 3-5 minutes while stirring. Stir herbs, except for a tablespoon, and processed cheese into the sauce and season with pepper, nutmeg and lemon juice.
Add the vegetables to the sauce, warm them up and arrange them on plates with chops and potatoes. Serve sprinkled with herbs.