Wash the potatoes. Boil in salted water and cook for 15 minutes. In the meantime, wash the asparagus and cut off the woody ends. Cook the asparagus in boiling salted water with a little sugar for about 5 minutes. Drain, quench and drain.
Drain the potatoes, rinse and peel. Cut potatoes into slices. Cut asparagus in half lengthwise. Grate parmesan finely. Mix cream and parmesan. Season with salt, pepper and nutmeg. Grease a flat casserole dish. Layer potatoes and asparagus. Pour cream mixture over it. Gratinate in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 45 minutes.
Season with salt, pepper and nutmeg. Grease a flat casserole dish. Layer potatoes and asparagus. Pour cream mixture over it. Gratinate in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 45 minutes. Remove and let cool slightly for 5 minutes on a cake rack. Garnish with a bouquet of herbs