Preheat the oven to 400°F. Line a baking sheet with foil or parchment paper for easy cleanup, if desired.
Trim the tough woody ends from the asparagus and arrange the spears in a single layer on the prepared baking sheet.
Drizzle the olive oil evenly over the asparagus and toss to coat.
Sprinkle the garlic salt evenly over the asparagus.
Roast for 8-10 minutes, or until the asparagus is crisp-tender and lightly browned. Avoid overcooking, as the asparagus will continue to soften slightly after it's removed from the oven.
Squeeze the fresh lemon juice over the roasted asparagus.
Sprinkle with the Parmesan cheese and serve immediately.
Notes
Refrigerator the leftovers in an air tight container for up to 5 days.