Peel the asparagus in the lower third, cut off the hard ends. Cut the sticks into pieces approx. 2 cm long. Steam the shallot in butter, pour in the stock and bring to the boil. Add the asparagus pieces and cook for about 15 minutes.
Puree finely with a hand blender. Add the cream, bring to the boil and mix again.
Season to taste and serve sprinkled with chives and croutons.