Preheat oven to 425 degree F
Place the asparagus onto a cookie sheet, drizzle with the oil nd sprinkle over the salt and pepper.
Roast for 8-10 minutes for thin asparagus and 10-15 minutes for thick asparagus, or until tender.
Remove front he oven and top with the lemon zest and juice, then freshly grate over the parmesan