Prep the zucchini: Rinse and dry the zucchini well. Trim the ends. Cut into 1/2-inch thick rounds or half-moons.
For “fries,” slice lengthwise into 1/2-inch sticks. Consistent size helps even cooking.
Season: Add zucchini to a large bowl. Drizzle with olive oil and toss to coat.
Sprinkle in salt, pepper, garlic powder, onion powder, Italian seasoning, and red pepper flakes if using. Toss again until the spices cling.
Add Parmesan: Sprinkle the Parmesan over the seasoned zucchini and gently toss. The cheese should lightly coat the pieces without clumping.
Preheat the air fryer: Set it to 400°F (200°C) for 3 minutes.
A hot basket helps the zucchini crisp up quickly.
Arrange in the basket: Place zucchini in a single layer. Some overlap is okay, but don’t pack it tight. Cook in batches if needed.
Air fry: Cook at 400°F for 8–10 minutes, shaking the basket or flipping halfway.
You’re aiming for golden edges and tender centers. Thicker cuts may need another 2 minutes.
Finish and serve: Taste and adjust salt. Add a squeeze of lemon and a sprinkle of fresh herbs.
Serve hot with your favorite dip or next to your main dish.