Fire your oven until it reaches 700ºF, and then allow the temperature to fall to about 500ºF, maintaining a bed of coals to lightly brown the asparagus.
Remove the tough asparagus stems.
Add 2 Tbs olive oil and the asparagus to a stainless steel or cast iron pan. Toss to mix, and then season with salt and pepper.
Roast in a moderate oven for a few minutes, until lightly brown but still a little crisp.