Rinse asparagus spears under cold water and pat completely dry with paper towels—moisture prevents proper crisping. Trim the woody bottom inch from each spear by snapping them naturally where they bend, discarding the tough ends.
Place dried spears in a large bowl and drizzle with olive oil, tossing gently to coat every surface evenly. Combine garlic powder, sea salt, black pepper, paprika, cayenne, Italian herbs, and onion powder in a small bowl, stirring thoroughly to distribute spices uniformly.
Sprinkle the spice mixture over oiled asparagus and toss again gently until every spear receives an even coating of seasonings. This step determines your final flavor intensity, so take 30 seconds here to ensure thorough distribution without crushing delicate tips.
Preheat your air fryer to 400°F for 3 minutes while arranging spears in a single layer inside the basket. Elegant air fryer asparagus recipe depends on proper spacing—arrange them lengthwise without overlapping so hot air circulates completely around each piece.
Air fry at 400°F for 12 minutes, shaking the basket gently halfway through cooking to ensure even browning on all sides. The spears should bend slightly when done but remain crisp, with golden-brown tips and tender stalks throughout.
Remove from the air fryer and immediately drizzle with fresh lemon juice while the spears remain hot, which helps the acids penetrate and brighten flavors. Sprinkle grated Parmesan cheese over the top while the vegetables steam slightly, allowing cheese to soften and cling to each spear.
Transfer to a serving platter and let rest for 2 minutes before presenting, allowing residual heat to finish any light crisping on the outer edges.