Cut the ends off the asparagus (not the buds) and discard ends. Chop remainder into thirds for easy eating.
Melt the butter in a large skillet over medium-high heat. Add the garlic and asparagus spears; cover and cook for 10 minutes, stirring occasionally, or until asparagus is tender.
If you like your asparagus well done, reduce heat and cook an additional 10 minutes.