Wash and peel the asparagus and cut off the woody ends. Boil the peel and ends with 1 l water and lemon. Add salt and sugar and simmer for about 10 minutes
Cut the asparagus into small pieces. Clean, wash and cut the mangetouts into strips. Lift out asparagus peel and ends. Boil up the asparagus water. Cook the asparagus for about 12 minutes. Add sugar snap peas and cook for approx. 2 (frozen peas approx. 5) minutes. Take out
Heat the fat in a saucepan. Sweat flour in it. Deglaze with asparagus water while stirring. Bring to the boil and simmer for about 5 minutes
Remove the shrimps from their shells, remove the intestines. Fry prawns in hot oil for about 2 minutes on each side. Season with salt and chili
Season soup with salt, pepper and possibly wine aperitif. Add vegetables, heat up. Pull the pot off the stove. Whisk cream and egg yolk. First mix with some soup, then stir back into the soup. Do not boil any more! Arrange prawns on top