In a large soup pot, add the butter and melt it over medium heat. Add the onion and saute until it begins to soften and melt, but not until brown since you want the soup to maintain a light, creamy shade. Add the peeled white asparagus (it is an extremely fibrous vegetable so make sure to peel it before cooking), the broth and the wine. Bring to a boil over medium heat, then reduce the heat and simmer until the asparagus is tender, about 20 to 25 minutes. Let the soup cool for about 5 minutes. Carefully add the soup, in batches, to a blender and puree. Return the soup to the pot over low heat. Add the half-and-half and season with salt and white pepper, to taste. Warm the soup until heated through. Ladle the soup into serving bowls and garnish with chervil before serving.

This recipe was provided by professional chefs and has been scaled down from a bulk recipe provided by a restaurant. The Food Network Kitchens chefs have not tested this recipe, in the proportions indicated, and therefore, we cannot make any representation as to the results.