Saute the onion en brunoise and garlic in a touch of olive oil until the onion is translucent. Chop the asparagus, reserve some tips for decoration and add them to the pot, adding the broth and undoing it with your fingertips. Season with salt and pepper to taste. Saute for about 15 minutes over medium heat, stirring frequently.
Step 2
Add freshly boiled water until it is almost covered, not much, and let it boil for about 12 minutes and rest for 8 minutes. Bring it to the blender to process and grind very well. It is by itself creamy and very very rich, return to the pot and heat to taste. Serve and garnish with a little sour cream and sautéed asparagus tips.