Wash and peel the asparagus, cut off the woody end. Boil cleaning waste in 1/2 litre of boiling salted water for about 10 minutes. Remove with a skimmer. Cut the asparagus spears in half and cook them in vegetable water with a pinch of sugar for 15-20 minutes.
Clean and wash the dandelions and pluck them into bite-sized pieces. Clean, wash and finely dice radishes. Mix vinegar with salt, pepper and sugar. Whip the oil under it and add the radish cubes.
Drain the asparagus and let it cool down a little. Use the asparagus water later for a soup. Arrange on plates with the dandelion salad and the ham. Pour marinade over them.