Begin by sauteing the asparagus and fennel for five minutes in a pan set over medium-high heat. Then add in the vegetable stock and water and allow the soup to come to boil. When the mixture reaches a boil, reduce the heat and allow to simmer for 10-12 minutes. After the soup has simmered, add in the herbs and use an immersion blender to blend the vegetables until smooth. Season with salt and pepper before serving. Enjoy!