Heat olive oil in a large, shallow pan over medium heat. When oil is hot, arrange asparagus evenly over the bottom of the pan. Cook for 2 to 3 minutes. Stir once. Continue cooking, stirring as needed, until bright green and tender, 6 to 8 minutes.
Stir in mint, cook for about 30 seconds, and remove from heat. Squeeze lemon juice over asparagus and season with salt and pepper.