Wash and peel the asparagus and cut off the woody ends generously. Wash potatoes thoroughly and boil in water for about 20 minutes. Steam asparagus in little boiling salted water with a little sugar for 15-18 minutes, depending on the thickness of the stalks.
For the sauce, wash the herbs, shake dry and pluck the leaves. Cut or chop the herbs very finely. Mix sour cream, sour cream and mustard. Season with salt, pepper and lemon juice.
Stir in the herbs. Season to taste again.
Drain the potatoes and asparagus. Serve both with ham and sauce. Sprinkle with remaining herbs.