Peel and wash the carrots and cut them into thin sticks. Peel parsley roots and cut into thin slices. Clean, wash and cut leek into strips. Spread the vegetables on 4 large greased pieces of parchment paper.
Place the cured pork slices on top. Sprinkle with thyme and pepper. Close the packet and cook in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 25-30 minutes. Peel and wash the potatoes and cook in boiling salted water for about 20 minutes.
Wash the parsley, dab dry and chop finely, except for a little to garnish. Drain the potatoes. Sprinkle 1/3 of the parsley on top. Open the vegetable casserole packet and sprinkle with the remaining chopped parsley.
Serve together with the potatoes. Garnish the smoked pork with parsley leaves and thyme.