Preheat air fryer to 370 degrees. In a large bowl, add asparagus, olive oil, and salt and pepper (I like at least 1/4 teaspoon salt and 1/8 teaspoon pepper). Toss to combine. Be sure to coat the tips of the asparagus well so they don't scorch.
Transfer the asparagus to the basket of an air fryer and arrange in a single layer (work in batches if necessary). Leave enough space for air to circulate around the asparagus without overcrowding.
Air fry at 370 degrees for 6 to 8 minutes or until the asparagus is tender-crisp but still green with browned edges. Shake the basket halfway through to ensure even heating. Serve hot or at room temperature with lemon wedges.
Notes
Asparagus: To trim the tough, woody ends of each spear, cut it with a knife or bend it until it snaps. The asparagus will break precisely where the tender part ends and the tough part begins. Keep a close eye on slim, thin asparagus spears, as they will likely cook faster than thick spears.
Yield: This easy Air Fryer Asparagus recipe makes four side dish-sized servings. If you'd like to make more, I recommend doing so in two batches, since overcrowding the air fryer can result in soggy or limp results.
Storage: Store leftovers in an airtight container in the refrigerator for up to 4 days.