Preheat the air fryer: Set your air fryer to 390°F (200°C) for 3–5 minutes. A hot basket helps the chicken brown right away.
Prep the chicken: Pat the chicken dry with paper towels.
This removes extra moisture and helps the seasoning stick and the edges crisp up.
Cut the veggies: Slice the zucchini into chunky half-moons so they don’t overcook. If using red onion, cut into wedges so they roast nicely.
Season everything: In a large bowl, toss chicken and veggies with olive oil, garlic powder, onion powder, smoked paprika, Italian seasoning, salt, pepper, and lemon juice. Coat evenly.
Taste a zucchini slice and adjust salt if needed.
Arrange in the basket: Place chicken and veggies in a single layer if possible. A little overlap is fine, but avoid piling too high. Work in two batches if your air fryer is small.
Air fry: Cook at 390°F (200°C) for 10–14 minutes, shaking the basket or stirring halfway through.
Chicken is done when it reaches 165°F (74°C) internally and shows golden edges. Zucchini should be tender with light browning.
Finish and serve: Sprinkle with Parmesan, fresh herbs, and a pinch of red pepper flakes if you like. Add a squeeze of lemon for brightness.
Taste and add a pinch more salt to wake up the flavors.
Make it a meal: Serve over rice, quinoa, cauliflower rice, or with warm pita and hummus. A drizzle of yogurt or tzatziki is great too.