Snap off the tough ends of the asparagus (about 1 inch from the bottom). Rinse under cold water.

Drizzle the asparagus with 2 tsp vegetable oil and toss to coat evenly.

Arrange the asparagus in a single layer in the air fryer basket, ensuring not to overcrowd.

Roast the asparagus in the air fryer at 375 degrees F for 6-8 minutes, depending on stalk thickness, until tender-crisp.

Sprinkle the asparagus with 1/2 tsp salt and squeeze fresh lemon juice over it before serving.