Pre-heat oven to 220C/425F/Gas 7 and. Line a large, rimmed baking sheet with parchment paper or a Silpat® baking mat. Set aside.
Spread the trimmed asparagus onto the prepared baking sheet and drizzle with the olive oil. Season with salt and black pepper, to taste, and gently toss to combine. When asparagus is evenly coated, spread into a single layer without overcrowding.
Place baking sheet into the preheated oven and roast for 8-10 minutes, or until crisp-tender. Turn the asparagus once while roasting. Actual cook time will depend on the thickness of the asparagus and the desired consistency. Check after 6 minutes and adjust cook time accordingly.