Peel and finely chop the onion. Clean, wash and slice the leek. Clean, peel and slice the carrots. Heat oil in a pot and fry onion.
Add leek and carrots and steam briefly. Add rice and sauté. Season with salt and pepper. Deglaze with stock and bring to the boil. Leave to swell over low heat for 15-20 minutes, stirring occasionally.
Grate the Parmesan finely and stir it into the risotto with the cream shortly before the end of the cooking time. Season again and arrange on a plate. Wash parsley, dab dry and pluck leaves from the stalk.
Cut into fine strips and sprinkle over the risotto. Serve sprinkled with parmesan slices as desired.