1/2 pound fresh asparagus 1 tablespoon v egetable oil two tablespoons finely chopped shallots or onion 1 tablespoon finely chopped garlic clove 1/2 teaspoon salt 1/4 teaspoon pepper 4 cups chicken broth 2 teaspoons corn starch two tablespoons water 1 egg, well beaten 1/4 pound