Peel, wash and slice the potatoes. Bring milk and stock to the boil, add potato slices and cook over medium heat for about 15 minutes. Cook Brussels sprouts in boiling salted water for about 10 minutes, drain. Add sprouts to the potatoes, season with salt, pepper and nutmeg. Pour into a greased casserole dish.
Sprinkle with ham and cheese. Bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 10 minutes. Wash the parsley and chop it, except for a little bit for garnishing. Sprinkle casserole with parsley and garnish