Place asparagus on a plate. Spray oil over the asparagus and turn spears until they are coated. Sprinkle them with salt and turn again.
Grill asparagus for 5 minutes over a hot grill. Each minute or so, roll the spears 1/4 turn. The asparagus should get brown grill marks, but don't let hem char.
Serve with hollandaise sauce or a lemon wedge to squirt over them.