Wash and peel the asparagus. Boil the bowls in water, seasoned with 1/2 teaspoon salt, 1/2 teaspoon sugar and a little butter. Then strain and measure out 1/2 liter of brew.
Melt butter or margarine and dust with flour, let it sweat a little and then slowly pour in the asparagus stock and simmer a little. In the meantime, cook the asparagus in the remaining stock until al dente and then add it to the asparagus sauce. Season with a dash of cream, a little lemon juice, salt, pepper and a pinch of sugar.