Here's my favorite recipe for asparagus...it's quick, easy and very healthy because you don't lose any nutrients in the cooking process. A grill pan is helpful to keep the spears from diving into the coals.
Rinse 1 lb asparagus and snap off the ends by holding the asparagus and breaking from the bottom end. Let the asparagus break naturally and this will remove the tough bottoms. Save the bottoms in the freezer for the next time you make broth.
Pat dry the asparagus then drizzle with 1-2 tablespoons olive oil, sprinkle with sea salt and top with lemon zest or a little lemon juice. Grill for 5 minutes and enjoy hot or cold.