Preheat your air fryer: Set it to 390°F (200°C) for 3–5 minutes so the basket is hot and ready.
Prep the asparagus: Rinse and pat dry. Snap or trim off the woody ends—about 1 to 2 inches.
Cut long spears in half if needed for even cooking.
Prep the mushrooms: Wipe clean with a damp towel. Slice into 1/4-inch pieces. Avoid soaking them so they don’t steam.
Season: In a large bowl, toss asparagus and mushrooms with olive oil, garlic, salt, and pepper until evenly coated.
Add a light pinch of lemon zest if you want extra brightness.
Load the basket: Spread in a single layer. A small overlap is fine, but don’t overpack. Work in batches if needed.
Air fry: Cook for 8–10 minutes total, shaking the basket halfway.
Asparagus should be tender-crisp with browned tips; mushrooms should be golden and slightly chewy at the edges.
Finish: Squeeze fresh lemon juice over the vegetables. Taste and adjust salt and pepper. Add optional parmesan, red pepper flakes, herbs, or a drizzle of balsamic.
Serve: Plate immediately while hot for the best texture.