1. Brush the asparagus with oil or butter until coated. This prevents the spears from sticking to the grill rack!
2. For a gas grill: After preheating, reduce to medium heat. Add the asparagus over direct heat and grill uncovered for about 7-10 minutes, turning the asparagus occasionally, until they are tender and crisp.
3. For a charcoal grill: Place the asparagus directly over the coals, and cook for about 7-10 minutes.