Preheat oven to 425 degrees F. wash asparagus with cold water and dry thoroughly with a towel.
To trim asparagus, snap the end of one spear and cut remaining asparagus same length with a knife. Usually you remove 1.5-2 inches of chewy stringy part.
Arrange asparagus on a large rimmed baking sheet in a single layer.
Drizzle with olive oil, then sprinkle with minced garlic, salt and pepper. Using tongs, toss to coat evenly. Spread asparagus spears in a single layer with minimum touching each other.
Bake asparagus for 12 minutes. Asparagus is ready when it turns bright green, is tender but still has a bite to it. If asparagus is hard to chew, it is undercooked. If it is mushy, it is overcooked.
Remove from the oven, sprinkle with Parmesan cheese if you wish and serve warm.
Notes
Store: Refrigerate leftovers covered for up to 2 days. Do not freeze.
Choose the right sized baking sheet: Make sure you use a large enough baking sheet so the pan is not overcrowded. If you pile asparagus on top of each other, the asparagus will steam instead of roasting.