Preheat oven to 375°F.
Toss asparagus with the oil, garlic powder, black pepper, and salt.
Place asparagus on a cookie sheet or other sheet pan and roast in preheated oven for 5 minutes, or until slightly tender.
Top asparagus with parmesan and bake for an additional 2-4 minutes, or until cheese is melted and has started to brown.
Serve warm.