Create the Marinade: In a large mixing bowl, whisk together the extra virgin olive oil, fresh lemon juice, lemon zest, dried oregano, smoked paprika, garlic powder, black pepper, and Dijon mustard. This creates a potent, salt-free flavor base.
Combine Vegetables & Legumes: To the mixing bowl, add the prepared zucchini, red bell pepper, red onion, and the rinsed and drained chickpeas. Gently toss to ensure everything is lightly coated.
Incorporate the Protein: Add the cubed chicken breast to the bowl with the vegetables. Toss thoroughly until the chicken is evenly coated with the marinade and spices. Let it sit for 5 minutes to allow the flavors to penetrate.
Begin the First Air Fry: Preheat your air fryer to 390°F (200°C). Arrange the chicken, red bell pepper, and red onion pieces in a single, even layer in the air fryer basket, reserving the other vegetables in the bowl. Cook for 8 minutes, shaking the basket halfway through. This initial stage gives the chicken and heartier vegetables a head start on browning.
Complete the Final Air Fry: After 8 minutes, open the basket and add the reserved zucchini, cherry tomatoes, and Kalamata olives. Gently toss everything together in the basket. Return the basket to the air fryer and cook for an additional 6−8 minutes, or until the chicken is cooked through (reaches an internal temperature of 165°F or 74°C) and the vegetables are tender-crisp.
Finish and Serve: Carefully transfer the contents of the air fryer basket to a serving platter or individual bowls. Immediately sprinkle with the crumbled feta cheese and fresh chopped dill. The residual heat will slightly soften the cheese and release the aroma of the dill. Serve hot.