Wash the asparagus. Peel white asparagus. Cut woody ends off the white and green asparagus. Cook the white asparagus in salted water with some sugar for about 12 minutes until al dente. Add the green asparagus after about 6 minutes.
Grate cheese. Melt 15 g butter in a pot. Stir in flour and roast for about 1 minute. Add the stock and milk while stirring to create a thicker sauce. Simmer for 5-8 minutes while stirring. Stir in 1/3 of the cheese, then season to taste with salt, pepper and nutmeg. Cover the surface of the sauce with foil
Wash the potatoes thoroughly and boil them in boiling water for about 25 minutes until soft. Drain the asparagus and let it drain well. Wrap each 4-5 stalks of asparagus (approx. 250 g) with a slice of ham. Put asparagus parcels on a plate and pour the sauce over them. Sprinkle the remaining cheese on top and bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 15 minutes until golden brown
Wash the chives, shake dry and cut into thin rings. Melt 100 g butter in a small pot. Drain the potatoes and possibly cut them in half
Sprinkle the asparagus with chive rolls. Add warm liquid butter