Saute onion in butter. Cut up asparagus, reserving the tips for ... smooth. Add 1/2 of the cooked asparagus and 1/3 of the soup. Blend until very smooth. ... calories each 3/4 cup.
Melt butter in a saucepan. ... add four cups of water (that the asparagus was boiled in); boil 5 ... it to the soup. If needed, add salt ... about 100 years old.