Tie approx. 40 cm roasting tube at one end with the enclosed plastic tape. Peel the asparagus and cut off the ends. Put the asparagus with the water, a little lemon juice, salt, butter and sugar in the roasting tube. Tie up the roasting tube. Cut across the roasting tube at the top, like a chimney. Put in the oven at 180 ° C top / bottom heat (preheated) for 25 minutes.
After the cooking time, take the roasting tube out of the oven, carefully cut the tube open (attention: very hot!) And serve the asparagus with boiled potatoes, hollandaise sauce and ham.
The intensive brew from the roasting tube can still be used excellently for asparagus soup or hollandaise sauce.