01 -
Wash the asparagus and snap off the woody ends (or trim with a knife). Cut the spears into 2-inch (5cm) pieces. Set aside half of the asparagus tips for the garnish.
02 -
In a large pot, melt the butter over medium heat. Add the diced onion and sauté until translucent, about 3-4 minutes. Add the asparagus pieces (except the reserved tips) and cook for another 5 minutes, stirring occasionally.
03 -
Pour in the vegetable broth, bring to a gentle boil, then reduce heat and simmer for about 10 minutes until the asparagus is completely tender. Stir in the crème fraîche, then use an immersion blender to purée until silky smooth. Season with salt and pepper to taste.
04 -
While the soup is simmering, melt 1 tablespoon of butter in a small skillet over medium heat. Add the reserved asparagus tips and sauté for 2-3 minutes until tender-crisp and lightly browned. Season with a pinch of salt. Serve the soup hot with the sautéed asparagus tips floating on top.