AllRecipes.com offers a popular asparagus soup recipe called Cream of Fresh Asparagus Soup II. The recipe has a preparation time of only 15 minutes and an average rating of nearly five stars out of five from those who have tried it.
To make Cream of Fresh Asparagus Soup II, trim 1 pound of asparagus and chop it in 1-inch pieces. Chop 1/2 cup of onion. Combine the asparagus and onion with 1/2 cup of chicken broth in a large saucepan. Cover the pan, and bring the broth mixture to a boil. Reduce the heat, uncover the pan and simmer for about 12 minutes. Puree everything in a blender.
Next, melt 2 tablespoons of butter in the saucepan. Over medium-low heat, stir in 2 tablespoons of flour and 1 teaspoon of salt. Add a pinch of pepper, and cook for two minutes, stirring often. Stirring with a whisk, add another 1/2 cup of chicken broth, and cook over medium heat until it boils, stirring constantly. Add the asparagus puree and 1 cup of milk.
Put 1/2 cup of sour cream in a small bowl. Use a ladle once to add of a portion of the soup mixture to the sour cream before returning everything to the main pot. Add 1 teaspoon of fresh lemon juice. Heat the soup to room temperature while stirring constantly, and then serve.